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A102012 Triangle formed by right half of A101842, read by rows. 2
1, 3, 1, 16, 7, 1, 115, 61, 15, 1, 1056, 626, 206, 31, 1, 11774, 7554, 2989, 659, 63, 1, 154624, 105099, 47349, 13308, 2052, 127, 1, 2337507, 1660957, 824331, 274677, 56935, 6297, 255, 1, 39984640, 29428654, 15747154, 5960818, 1518478, 237862 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..42.

EXAMPLE

Triangle begins:

1

3, 1

16, 7, 1

115, 61, 15, 1

1056, 626, 206, 31, 1

11774, 7554, 2989, 659, 63, 1

MAPLE

A101842 := proc(n, k) option remember ; if k < -n or k >= n then 0 ; elif n = 1 then 1; else (n-k)*A101842(n-1, k-1)+A101842(n-1, k)+(n+k+1)*A101842(n-1, k+1) ; fi ; end: A102012 := proc(n, k) A101842(n, k-1) ; end: for n from 1 to 10 do for k from 1 to n do printf("%d, ", A102012(n, k)) ; od: od: # R. J. Mathar, Aug 07 2007

CROSSREFS

Sequence in context: A326374 A143565 A143018 * A128249 A071211 A222029

Adjacent sequences:  A102009 A102010 A102011 * A102013 A102014 A102015

KEYWORD

nonn,tabl

AUTHOR

David Applegate, Jun 19 2007

EXTENSIONS

More terms from R. J. Mathar, Aug 07 2007

STATUS

approved

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Last modified October 15 13:06 EDT 2019. Contains 328030 sequences. (Running on oeis4.)