A165193 Eigensequence of triangle A038208.

1, 4, 28, 352, 7888, 319168, 23833792, 3359617024, 911281182976

Offset

1,2

Links

Table of n, a(n) for n=1..9.

Formula

Given triangle A038208 as an infinite lower triangular matrix: [1; 2,2; 4,8,4; 8,24,24,8;...], shift the triangle down one row, inserting "1" at (0,0) = triangle Q. Then lim:_{n->oo} Q^n generates a one-column vector [1, 1, 4, 28, 352,...] such that A038208 * the vector = [1, 4, 28,...].

Crossrefs

Cf. A038208.

Sequence in context: A223887 A140425 A193198 * A309147 A217903 A339283

Adjacent sequences: A165190 A165191 A165192 * A165194 A165195 A165196

Keyword

nonn,more

Author

Gary W. Adamson, Sep 06 2009

Status

approved