A132626 Column 0 of triangle A132625.

1, 1, 2, 14, 336, 25836, 6251504, 4838830976, 12344615283200, 106978340796778976, 3229124399759665954432, 346176173916459184212747520, 133788163509847808639178273046528

Offset: 0

Author

Paul D. Hanna, Aug 25 2007

Keywords

• nonn

Comments

Triangle T=A132625 is generated by matrix powers of itself such that row n+1 of T = row n of T^(2^n) with appended '1' for n>=0 with T(0,0)=1.

Crossrefs

Cf. A132625, A132627.

Programs

PARI

{a(n)=local(A=vector(n+1), p); A[1]=1; for(j=1, n, p=2^n-2^(n-j)-j; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A[p+1]}