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A344947 Number of open tours by a biased rook on a specific A070941(n) X 1 board, which ends on a black cell, where cells are colored white or black according to the binary representation of 2n. 2
1, 1, 1, 4, 1, 4, 8, 18, 1, 4, 8, 18, 16, 36, 54, 96, 1, 4, 8, 18, 16, 36, 54, 96, 32, 72, 108, 192, 162, 288, 384, 600, 1, 4, 8, 18, 16, 36, 54, 96, 32, 72, 108, 192, 162, 288, 384, 600, 64, 144, 216, 384, 324, 576, 768, 1200, 486, 864, 1152, 1800, 1536, 2400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

A cell is colored white if the binary digit is 0 and a cell is colored black if the binary digit is 1. A biased rook on a white cell moves only to the left and otherwise moves in any direction.

LINKS

Table of n, a(n) for n=0..61.

FORMULA

a(n) = A284005(2*A053645(n)) for n > 0 with a(0) = 1.

CROSSREFS

Cf. A053645, A070941, A284005, A329369, A329718.

Sequence in context: A162956 A131112 A141225 * A079185 A133819 A344686

Adjacent sequences:  A344944 A344945 A344946 * A344948 A344949 A344950

KEYWORD

nonn

AUTHOR

Mikhail Kurkov, Jun 03 2021

STATUS

approved

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Last modified November 30 04:55 EST 2021. Contains 349418 sequences. (Running on oeis4.)