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A062106 Number of ways a black pawn (from any starting square on the second back rank) can (theoretically) end on the n-th square of the leftmost file counted from the back rank. 1
0, 1, 2, 6, 15, 40, 109, 302, 846, 2390, 6796, 19426, 55767, 160668, 464305, 1345282, 3906701, 11367696, 33135987, 96740610, 282831981, 827939880, 2426431239, 7118546874, 20904025380, 61439768166, 180725813478, 532004277518 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..28.

MAPLE

[seq(ChessPawnTriangle(j, 1), j=1..40)];

CROSSREFS

The left column of table A062104. Cf. also A062107.

Sequence in context: A307128 A172399 A001654 * A206000 A316981 A319560

Adjacent sequences:  A062103 A062104 A062105 * A062107 A062108 A062109

KEYWORD

nonn

AUTHOR

Antti Karttunen, May 30 2001

STATUS

approved

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Last modified February 23 23:59 EST 2020. Contains 332195 sequences. (Running on oeis4.)