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A132473 Column 1 of triangle A132471. 3
1, 2, 4, 30, 384, 7300, 186620, 6046600, 239321824, 11283624600, 622168133880, 39555748796080, 2867144894306352, 234743115413228864, 21539307881356682144, 2200021023571489017104, 248656258771528223642624 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Diagonal m of triangle T=A132471 equals diagonal m-1 of matrix power T^m for m>1: T(n,k) = [T^(n-k)](n-1,k) for n>=k>0, with T(n,n)=1 and T(n+1,n)=n+1 for n>=0.

LINKS

Table of n, a(n) for n=0..16.

CROSSREFS

Cf. A132471 (triangle); other columns: A132472, A132474.

Sequence in context: A241542 A241540 A208097 * A053037 A018294 A334488

Adjacent sequences:  A132470 A132471 A132472 * A132474 A132475 A132476

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Aug 22 2007

STATUS

approved

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Last modified July 26 17:37 EDT 2021. Contains 346294 sequences. (Running on oeis4.)