A165193 - OEIS

A165193

Eigensequence of triangle A038208.

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

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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: A140425 A377551 A193198 * A309147 A217903 A339283

Adjacent sequences: A165190 A165191 A165192 * A165194 A165195 A165196

KEYWORD

nonn,more

AUTHOR

Gary W. Adamson, Sep 06 2009

STATUS

approved