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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: A301503 A378103 A378336 * 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 4 15:40 EST 2024. Contains 378414 sequences.
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