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A144381 Fifth diagonal of A142458: A(n,k)= (3*n - 3*k + 1)A(n - 1, k - 1) + (3*k - 2)A(n - 1, k). 0
1, 677, 47175, 1709675, 44451550, 947113254, 17716715490 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

FORMULA

A(n,k)= (3*n - 3*k + 1)A(n - 1, k - 1) + (3*k - 2)A(n - 1, k); a(n)=diagonal(a(n,k),5).

MATHEMATICA

Clear[A, a, b, n, m, k]; A[n_, 1] := 1; A[n_, n_] := 1; A[n_, k_] := (3*n - 3*k + 1)A[n - 1, k - 1] + (3*k - 2)A[n - 1, k]; a = Table[A[n, k], {n, 20}, {k, n}]; b = Table[a[[n + m - 1]][[n]], {m, 1, 10}, {n, 1, 10}]; Table[b[[5]][[n]], {n, 1, 10}]

CROSSREFS

Cf. A142458.

Sequence in context: A205749 A108824 A205471 * A097773 A248887 A031524

Adjacent sequences:  A144378 A144379 A144380 * A144382 A144383 A144384

KEYWORD

nonn,uned

AUTHOR

Roger L. Bagula and Gary W. Adamson, Oct 01 2008

STATUS

approved

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Last modified December 1 11:38 EST 2021. Contains 349429 sequences. (Running on oeis4.)