

A122479


Triangle T(n,k), 0<=k<=n, defined by T(n,k) = 0 if k<0 or k>n, T(0,0) = 1, T(n,k) = T(n,k1)+T(n1,k1)+T(n1,k)+T(n1,k+1).


1



1, 1, 2, 3, 6, 8, 9, 26, 40, 48, 35, 110, 224, 312, 360, 145, 514, 1160, 2056, 2728, 3088, 659, 2478, 5208, 12152, 20024, 25840, 28928, 3137, 12482, 33320, 71704, 129720, 204512, 259280, 288208, 15619, 64558, 182064, 416808, 822744, 1416256, 2168256
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OFFSET

0,3


LINKS

Table of n, a(n) for n=0..42.


EXAMPLE

Triangle begins:
1;
1, 2;
3, 6, 8;
9, 26, 40, 48;
35, 110, 224, 312, 360;
145, 514, 1160, 2056, 2728, 3088;


CROSSREFS

Sequence in context: A089437 A146768 A211370 * A285306 A047403 A286051
Adjacent sequences: A122476 A122477 A122478 * A122480 A122481 A122482


KEYWORD

nonn,tabl


AUTHOR

Philippe Deléham, Sep 15 2006


STATUS

approved



