A065943 Triangle of coefficients of Bessel polynomials {y_n(x)}''.
3, 6, 30, 10, 90, 315, 15, 210, 1260, 3780, 21, 420, 3780, 18900, 51975, 28, 756, 9450, 69300, 311850, 810810, 36, 1260, 20790, 207900, 1351350, 5675670, 14189175, 45, 1980, 41580, 540540, 4729725, 28378350, 113513400, 275675400
Offset: 2
Keywords
Examples
For n = 2 .. 5 the polynomials are 6; 30+90*x; 90+630*x+1260*x^2; 210+2520*x+11340*x^2+18900*x^3.
References
- J. Riordan, Combinatorial Identities, Wiley, 1968, p. 77.