OFFSET
0,2
COMMENTS
P(n,k,n) counts palindromes.
FORMULA
E.g.f.: exp(2*y)*(BesselI(0, 2*x*y)+BesselI(1, 2*x*y)). - Vladeta Jovovic, Dec 15 2004
EXAMPLE
Triangle begins:
1;
2, 1;
4, 4, 2;
8, 12, 12, 3;
16, 32, 48, 24, 6;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
STATUS
approved