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A272645
a(n) = largest term in row n of array in A272644.
2
1, 1, 5, 13, 73, 301, 2069, 11581, 95401, 673261, 6487445, 55213453, 610093513, 6077248381, 75796724309, 864806272861, 12020754177001, 154546274524621, 2369364111428885, 33888536448984493, 568128719132038153, 8947078682269788061
OFFSET
2,3
LINKS
Irving Kaplansky and John Riordan, The problem of the rooks and its applications, Duke Mathematical Journal 13.2 (1946): 259-268. The array is on page 267.
FORMULA
See A272644.
PROG
(PARI)
A(n, m) = sum(i=0, m, stirling(m+1, i+1, 2) * (-1)^((m-i)%2) * i^(n - m) * i!);
apply(vecmax, vector(22, n, vector(n, m, A(n+1, m)))) \\ Gheorghe Coserea, May 16 2016
CROSSREFS
Cf. A272644.
Sequence in context: A100209 A139361 A115329 * A137702 A140120 A303962
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 07 2016
EXTENSIONS
More terms from Gheorghe Coserea, May 16 2016
STATUS
approved