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A094388 Expansion of (1-2x-x^2)/((1-x)(1-3x)). +0
2
1, 2, 4, 10, 28, 82, 244, 730, 2188, 6562, 19684, 59050, 177148, 531442, 1594324, 4782970, 14348908, 43046722, 129140164, 387420490, 1162261468, 3486784402, 10460353204, 31381059610, 94143178828, 282429536482, 847288609444 (list; graph; listen)
OFFSET

0,2

COMMENT

Binomial transform of 0^n+A001045(n).

FORMULA

a(n)=3^n/3-0^n/3+1; a(n+1)/2=A007051(n); a(n+1)-1=3^n.

a(n)=A034472(n-1), n>0. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 05 2008]

CROSSREFS

Adjacent sequences: A094385 A094386 A094387 this_sequence A094389 A094390 A094391

Sequence in context: A106362 A099216 A034472 this_sequence A068875 A135336 A027412

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 28 2004

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.


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