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module Math.OEIS.Types where
type SequenceData = [Integer]
-- | Programming language that some code to generate the sequence is written
-- in. The only languages indicated natively by the OEIS database are
-- Mathematica and Maple; any other languages will be listed (usually in
-- parentheses) at the beginning of the actual code snippet.
data Language = Mathematica | Maple | Other deriving (Show, Eq)
-- | OEIS keywords. For more information on the meaning of each keyword, see
-- <http://oeis.org/eishelp2.html#RK>.
data Keyword = Base | Bref | Changed | Cofr | Cons | Core | Dead | Dumb | Dupe |
Easy | Eigen | Fini | Frac | Full | Hard | More | Mult |
New | Nice | Nonn | Obsc | Sign | Tabf | Tabl | Uned |
Unkn | Walk | Word
deriving (Eq,Show,Read)
-- | Data structure for storing an OEIS entry. For more information on the
-- various components, see <http://oeis.org/eishelp2.html>.
data OEISSequence =
OEIS { catalogNums :: [String],
-- ^ Catalog number(s), e.g. A000040, N1425. (%I)
sequenceData :: SequenceData,
-- ^ The actual sequence data (or absolute values of the sequence data in the case of signed sequences). (%S,T,U)
signedData :: SequenceData,
-- ^ Signed sequence data (empty for sequences with all positive entries). (%V,W,X)
description :: String,
-- ^ Short description of the sequence. (%N)
references :: [String],
-- ^ List of academic references. (%D)
links :: [String],
-- ^ List of links to more information on the web. (%H)
formulas :: [String],
-- ^ Formulas or equations involving the sequence. (%F)
xrefs :: [String],
-- ^ Cross-references to other sequences. (%Y)
author :: String,
-- ^ Author who input the sequence into the database. (%A)
offset :: Int,
-- ^ Subscript\/index of the first term. (%O)
firstGT1 :: Int,
-- ^ Index of the first term \> 1. (%O)
programs :: [(Language,String)],
-- ^ Code that can be used to generate the sequence. (%p,t,o)
extensions :: [String],
-- ^ Corrections, extensions, or edits. (%E)
examples :: [String],
-- ^ Examples. (%e)
keywords :: [Keyword],
-- ^ Keywords. (%K)
comments :: [String]
-- ^ Comments. (%C)
} deriving Show
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