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A046105 a(n) = A026301(n)/2^n. 2
1, 2, 16, 120, 882, 6468, 47680, 354224, 2652688, 20008864, 151853312, 1158365824, 8873772392, 68219456080, 526025997824, 4066475337152, 31505967787522, 244574907064964, 1901855959279776, 14811829930479600, 115514550050260068, 901993060739459720 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..21.

FORMULA

a(n) ~ 2^(3*n + 1/2) / (Pi * sqrt(n)). - Vaclav Kotesovec, Sep 26 2019

CROSSREFS

Cf. A065409, A026301, A060042.

Sequence in context: A088755 A136782 A112710 * A086854 A258683 A026129

Adjacent sequences:  A046102 A046103 A046104 * A046106 A046107 A046108

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, following a suggestion of Peter J Larcombe, Jan 16 2004

EXTENSIONS

More terms from Vaclav Kotesovec, Sep 26 2019

STATUS

approved

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Last modified June 5 12:47 EDT 2020. Contains 334840 sequences. (Running on oeis4.)