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

Offset: 1

Author

Antti Karttunen, May 30 2001

Keywords

• nonn

Crossrefs

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

Programs

Maple

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