A322768 Column 3 of array in A322765.

66, 249, 1075, 5133, 26683, 149410, 894124, 5683643, 38186471, 270054693, 2003233849, 15539557832, 125727364954, 1058517565329, 9254401000167, 83864649249661, 786443164853871, 7620060523287298, 76182494678422156, 784894262599538443, 8323844770001318027, 90767456208155581709

Offset

0,1

References

D. E. Knuth, The Art of Computer Programming, Vol. 4A, Table A-1, page 778.

Links

Seiichi Manyama, Table of n, a(n) for n = 0..500

Prog

(PARI) T(n, k) = if(k==0, sum(j=0, n, stirling(n, j, 2)), (T(n+2, k-1)+T(n+1, k-1)+sum(j=0, k-1, binomial(k-1, j)*T(n, j)))/2);
vector(20, n, T(n-1, 3)) \\ Seiichi Manyama, Nov 21 2020

Crossrefs

Cf. A322765, A322774.

Sequence in context: A046393 A268582 A117306 * A158070 A242726 A271739

Adjacent sequences: A322765 A322766 A322767 * A322769 A322770 A322771

Keyword

nonn

Author

N. J. A. Sloane, Dec 30 2018

Status

approved