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 A014413 Triangular array formed from elements to right of middle of Pascal's triangle. 7
 1, 1, 3, 1, 4, 1, 10, 5, 1, 15, 6, 1, 35, 21, 7, 1, 56, 28, 8, 1, 126, 84, 36, 9, 1, 210, 120, 45, 10, 1, 462, 330, 165, 55, 11, 1, 792, 495, 220, 66, 12, 1, 1716, 1287, 715, 286, 78, 13, 1, 3003, 2002, 1001, 364, 91, 14, 1, 6435, 5005, 3003, 1365, 455, 105, 15, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Reinhard Zumkeller, Rows n = 1..200 of triangle, flattened EXAMPLE 1; 1; 3, 1; 4, 1; 10, 5, 1; 15, 6, 1; 35, 21, 7, 1; 56, 28, 8, 1; 126, 84, 36, 9, 1; 210, 120, 45, 10, 1; 462, 330, 165, 55, 11, 1; 792, 495, 220, 66, 12, 1. PROG (Haskell) a014413 n k = a014413_tabf !! (n-1) !! (k-1) a014413_row n = a014413_tabf !! (n-1) a014413_tabf = [1] : f 1 [1] where    f 0 us'@(_:us) = ys : f 1 ys where                     ys = zipWith (+) us' (us ++ [0])    f 1 vs@(v:_) = ys' : f 0 ys where                   ys@(_:ys') = zipWith (+) (vs ++ [0]) ([v] ++ vs) -- Reinhard Zumkeller, Dec 24 2015 CROSSREFS Cf. A014462. Cf. A007318, A034868, A034869, A265848. Sequence in context: A180062 A340072 A079546 * A262072 A321743 A341766 Adjacent sequences:  A014410 A014411 A014412 * A014414 A014415 A014416 KEYWORD tabf,nonn,easy AUTHOR EXTENSIONS More terms from James A. Sellers STATUS approved

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Last modified April 21 14:49 EDT 2021. Contains 343154 sequences. (Running on oeis4.)