A107028 - OEIS

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A107028

Row sums of number triangle A107027.

2

1, 3, 5, 9, 19, 49, 155, 591, 2651, 13689, 80009, 522193, 3762273, 29629483, 252966249, 2325176147, 22874076091, 239615657133, 2661015200515, 31207545002577, 385191232715737, 4988767088734625, 67615869255979521

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..22.

FORMULA

a(n)=sum{k=0..n, (n-k-1)C((n-k)*k, k)-(n-k-2)*sum{j=0..k, C((n-k)*k, j)}}

CROSSREFS

Sequence in context: A255822 A227234 A192480 * A147470 A147010 A146912

Adjacent sequences: A107025 A107026 A107027 * A107029 A107030 A107031

KEYWORD

easy,nonn

AUTHOR

Paul Barry, May 09 2005

STATUS

approved