A093448 Rows sums of the triangle A093447.

1, 5, 32, 316, 4661, 94217, 2458810, 80128082, 3193424921, 153067911301, 8685693546692, 574691476630760, 43735137898763917, 3784250198022172001, 368841694500041857646, 40194470526005627873182

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Example

The row for n = 4 is
(1*2*3*4), (5*6*7), (8*9), 10 or
24 210 72 10.
hence a(4) = 24 +210 +72 +10 = 316.

Maple

A000217 := proc(n) n*(n+1)/2 ; end: A093447 := proc(n, k) factorial(k*n-A000217(k-1))/factorial((k-1)*n-A000217(k-2)) ; end: A093448 := proc(n) add( A093447(n, k), k=1..n) ; end: for n from 1 to 26 do printf("%d, ", A093448(n)) ; od: # R. J. Mathar, Jul 27 2007

Crossrefs

Cf. A093445, A093446, A093447.

Sequence in context: A363397 A023882 A109780 * A094653 A135250 A006926

Adjacent sequences: A093445 A093446 A093447 * A093449 A093450 A093451

Keyword

nonn

Author

Amarnath Murthy, Apr 02 2004

Extensions

More terms from R. J. Mathar, Jul 27 2007

Status

approved