1,2

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

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->inf.} Q^n generates a one-column

vector [1, 1, 4, 28, 352,...] such that A038208 * the vector = [1, 4, 28,...].

A038208

Sequence in context: A223887 A140425 A193198 * A309147 A217903 A339283

Adjacent sequences: A165190 A165191 A165192 * A165194 A165195 A165196

nonn

Gary W. Adamson, Sep 06 2009

approved