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A014940
a(1)=1, a(n)=n*22^(n-1)+a(n-1).
3
1, 45, 1497, 44089, 1215369, 32137161, 825796489, 20780659593, 514663521417, 12587355699337, 304746506405001, 7316566123340937, 174431600326980745, 4133772410690139273, 97461091512107447433, 2287542179758700278921
OFFSET
1,2
FORMULA
G.f.: x/((1-x) (-1+22 x)^2). - Harvey P. Dale, Apr 21 2011
MATHEMATICA
Table[(1+22^n (21n-1))/441, {n, 20}] (* or *) CoefficientList[ Series[1/((1-x) (-1+22 x)^2), {x, 0, 20}], x] (* Harvey P. Dale, Apr 21 2011 *)
CROSSREFS
Sequence in context: A107399 A053112 A240686 * A273436 A049397 A215859
KEYWORD
nonn,easy
STATUS
approved