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A138413 A bisection of A000957. 2
0, 0, 2, 18, 186, 2120, 25724, 325878, 4260282, 57048048, 778483932, 10786724388, 151355847012, 2146336125648, 30711521221376, 442862000693438, 6429286894263738, 93891870710425440, 1378379704593824300, 20330047491994213884, 301111732041234778316, 4476705468260134734384, 66784808491631598524136 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..22.

CROSSREFS

Cf. A000957, A138414.

Sequence in context: A183285 A129627 A279860 * A066274 A052623 A155542

Adjacent sequences:  A138410 A138411 A138412 * A138414 A138415 A138416

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, May 08 2008

STATUS

approved

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Last modified December 10 02:24 EST 2018. Contains 318036 sequences. (Running on oeis4.)