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A004142 n(3^n-2^n). 0
0, 1, 10, 57, 260, 1055, 3990, 14413, 50440, 172539, 580250, 1926089, 6328140, 20619703, 66732190, 214742085, 687698960, 2193154547, 6968850210, 22073006401, 69714716500, 219623377071, 690291036710 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

CROSSREFS

Equals n * A001047(n).

Sequence in context: A047780 A055251 A038733 * A006529 A246754 A024133

Adjacent sequences:  A004139 A004140 A004141 * A004143 A004144 A004145

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 21 07:18 EST 2018. Contains 299390 sequences. (Running on oeis4.)