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A138273 Column 1 of triangle A138271; also, column 0 of matrix power A138271^2. 4
1, 2, 10, 78, 798, 9874, 141282, 2273730, 40400466, 782174594, 16339339034, 365507560686, 8703242020078, 219514664265570, 5840845740086722, 163388004393303378, 4790811699042196754, 146865803196242855938 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Cf. A138271; A138272, A138274; A138275.

Sequence in context: A098692 A300994 A307722 * A301388 A052568 A063170

Adjacent sequences:  A138270 A138271 A138272 * A138274 A138275 A138276

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Mar 11 2008

STATUS

approved

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Last modified October 21 14:58 EDT 2019. Contains 328301 sequences. (Running on oeis4.)