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A093448
Rows sums of the triangle A093447.
2
1, 5, 32, 316, 4661, 94217, 2458810, 80128082, 3193424921, 153067911301, 8685693546692, 574691476630760, 43735137898763917, 3784250198022172001, 368841694500041857646, 40194470526005627873182
OFFSET
1,2
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
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 02 2004
EXTENSIONS
More terms from R. J. Mathar, Jul 27 2007
STATUS
approved