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A219054 (8*n^3 + 3*n^2 + n) / 6. 2
2, 13, 41, 94, 180, 307, 483, 716, 1014, 1385, 1837, 2378, 3016, 3759, 4615, 5592, 6698, 7941, 9329, 10870, 12572, 14443, 16491, 18724, 21150, 23777, 26613, 29666, 32944, 36455, 40207, 44208, 48466, 52989, 57785, 62862, 68228, 73891, 79859, 86140, 92742 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row sums of the triangle in A070216.
LINKS
FORMULA
a(n) = A000578(n) + A000330(n).
G.f. x*(2+5*x+x^2) / (x-1)^4 . - R. J. Mathar, Nov 12 2012
PROG
(Haskell)
a219054 n = n * (n * (8 * n + 3) + 1) `div` 6
(Maxima) A219054(n):=(8*n^3 + 3*n^2 + n) / 6$
makelist(A219054(n), n, 1, 20); /* Martin Ettl, Nov 12 2012 */
(PARI) a(n)=(8*n^3+3*n^2+n)/6 \\ Charles R Greathouse IV, Oct 18 2022
CROSSREFS
Sequence in context: A179925 A263980 A157185 * A154354 A138089 A296197
KEYWORD
nonn,easy
AUTHOR
Reinhard Zumkeller, Nov 11 2012
STATUS
approved

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)