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A123935 Number of (directed) Hamiltonian paths on the 4 X n knight graph. 4
0, 0, 16, 0, 164, 1488, 12756, 62176, 379376, 2426224, 13367704, 72972656, 402564940, 2167170608, 11412234916, 59638462576, 308861005448, 1581575598752, 8029891390392, 40482609620976, 202672272980456, 1008192626002544, 4987067296004984, 24540946112970792 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..500
Eric Weisstein's World of Mathematics, Knight Graph
FORMULA
a(n) = 2*A079137(n).
CROSSREFS
Cf. A079137, A306282.
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
EXTENSIONS
Terms a(22) and beyond from Andrew Howroyd, Oct 13 2019
STATUS
approved

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Last modified May 28 22:13 EDT 2024. Contains 372921 sequences. (Running on oeis4.)