A152410 Column 3 of triangle A152406; also, column 0 of matrix 4th power of A152406.

1, 4, 28, 260, 2916, 37712, 547240, 8751688, 152309648, 2857598164, 57379111732, 1225920973324, 27737038620452, 661937827915872, 16605857832896944, 436636765049489648, 12002769920717089856, 344160801015503753892

Offset

0,2

Comments

Matrix powers of triangle T=A152406 satisfy:

column k of T^(j+1) = column j of T^(k+1) for all j>=0, k>=0.

Links

Table of n, a(n) for n=0..17.

Crossrefs

Cf. A152406; A152407, A152408, A152409.

Sequence in context: A141004 A217806 A356197 * A177403 A360775 A196523

Adjacent sequences: A152407 A152408 A152409 * A152411 A152412 A152413

Keyword

nonn

Author

Paul D. Hanna, Dec 05 2008

Status

approved