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A123935 2*A079137(n). 1
0, 0, 16, 0, 164, 1488, 12756, 62176, 379376, 2426224, 13367704, 72972656, 402564940, 2167170608, 11412234916, 59638462576, 308861005448, 1581575598752, 8029891390392, 40482609620976, 202672272980456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..21.

Eric Weisstein's World of Mathematics, Knight Graph

CROSSREFS

Sequence in context: A059681 A135925 A188784 * A169764 A002607 A221404

Adjacent sequences:  A123932 A123933 A123934 * A123936 A123937 A123938

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 30 2006

STATUS

approved

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Last modified December 17 14:12 EST 2018. Contains 318201 sequences. (Running on oeis4.)