A062106 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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.

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