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 A059431 Triangle formed when cumulative boustrophedon transform is applied to 1, 0, 0, 0, ..., read by rows from left to right. 3
 1, 0, 1, 2, 1, 0, 0, 2, 5, 8, 51, 36, 21, 8, 0, 0, 51, 138, 246, 362, 478, 6178, 4903, 3628, 2404, 1318, 478, 0, 0, 6178, 17259, 31968, 49081, 67512, 86421, 105330, 2290069, 1926320, 1562571, 1205000, 864688, 556344, 297081, 105330, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Table of n, a(n) for n=0..44. FORMULA From Petros Hadjicostas, Feb 16 2021: (Start) If 1 == i mod 2, then T(i,j) = A059432(i,j). If 0 == i mod 2, then T(i,j) = A059432(i,i-j). If 1 == i mod 2, then T(i,i) = A059432(i,i) = A059429(i). If 0 == i mod 2, then T(i,0) = A059429(i,i) = A059429(i). (End) EXAMPLE Triangle T(i,j) (with rows i >= 0 and columns j = 0..i) begins: 1; 0, 1; 2, 1, 0; 0, 2, 5, 8; 51, 36, 21, 8, 0; 0, 51, 138, 246, 362, 478; 6178, 4903, 3628, 2404, 1318, 478, 0; 0, 6178, 17259, 31968, 49081, 67512, 86421, 105330; ... - Petros Hadjicostas, Feb 16 2021 CROSSREFS Cf. A059429, A059432. Sequence in context: A059220 A261630 A301503 * A289358 A271698 A113263 Adjacent sequences: A059428 A059429 A059430 * A059432 A059433 A059434 KEYWORD nonn,tabl,easy AUTHOR N. J. A. Sloane, Jan 31 2001 STATUS approved

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Last modified December 5 03:25 EST 2023. Contains 367567 sequences. (Running on oeis4.)