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A086274 Antidiagonal sums of A086272 (and of A086273). 7
1, 4, 12, 29, 60, 111, 189, 302, 459, 670, 946, 1299, 1742, 2289, 2955, 3756, 4709, 5832, 7144, 8665, 10416, 12419, 14697, 17274, 20175, 23426, 27054, 31087, 35554, 40485, 45911, 51864, 58377, 65484, 73220, 81621, 90724, 100567, 111189 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..39.

FORMULA

a(n)=n+Sum{(k+1)C(n+1-k, 2): k=1, 2, ..., n}.

n(n^3+6n^2-n+18)/24.

CROSSREFS

Cf. A086272, A086273.

A005582(n-1) + n.

Sequence in context: A050898 A009845 A014342 * A174121 A128563 A227085

Adjacent sequences:  A086271 A086272 A086273 * A086275 A086276 A086277

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jul 14 2003

STATUS

approved

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Last modified July 8 04:16 EDT 2020. Contains 335504 sequences. (Running on oeis4.)