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A124350 a(n) = 4*n*([n^2/2]+1). For n>=3, this is the number of directed Hamiltonian paths on the n-prism graph. 1
0, 4, 24, 60, 144, 260, 456, 700, 1056, 1476, 2040, 2684, 3504, 4420, 5544, 6780, 8256, 9860, 11736, 13756, 16080, 18564, 21384, 24380, 27744, 31300, 35256, 39420, 44016, 48836, 54120, 59644, 65664, 71940, 78744, 85820, 93456, 101380, 109896, 118716 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Eric Weisstein's World of Mathematics, Hamiltonian Path

CROSSREFS

Cf. A124349.

Sequence in context: A128205 A085250 A166870 * A112611 A181617 A011915

Adjacent sequences:  A124347 A124348 A124349 * A124351 A124352 A124353

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Oct 26, 2006

EXTENSIONS

Formula and further terms from Max Alekseyev (maxale(AT)gmail.com), Feb 7, 2008

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.