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A168067
n*(n^7+1)/2.
4
0, 1, 129, 3282, 32770, 195315, 839811, 2882404, 8388612, 21523365, 50000005, 107179446, 214990854, 407865367, 737894535, 1281445320, 2147483656, 3487878729, 5509980297, 8491781530, 12800000010, 18911429691, 27437936779, 39155492652, 55037657100, 76293945325
OFFSET
0,3
LINKS
FORMULA
G.f.: x*(1 + 120*x + 2157*x^2 + 7792*x^3 + 7827*x^4 + 2136*x^5 + 127*x^6)/(1-x)^9. - Vincenzo Librandi, Dec 10 2014
MATHEMATICA
Table[n (n^7 + 1)/2, {n, 0, 40}] (* or *) CoefficientList[Series[x (1 + 120 x + 2157 x^2 + 7792 x^3 + 7827 x^4 + 2136 x^5 + 127 x^6) / (1 - x)^9, {x, 0, 40}], x] (* Vincenzo Librandi, Dec 10 2014 *)
PROG
(Magma) [n*(n^7+1)/2: n in [0..40]]; // Vincenzo Librandi, Dec 10 2014
CROSSREFS
Cf. A168635.
Sequence in context: A327337 A305722 A189608 * A232034 A334360 A342897
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Dec 11 2009
EXTENSIONS
More terms from Vincenzo Librandi, Dec 10 2014
STATUS
approved