A107028 Row sums of number triangle A107027.

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

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