OFFSET
1,2
COMMENTS
Determinant of the n x n - Matrix A[i,j] with A[1,j]=1 (1<=j<=n) and A[i,j]=j^i (i>1, 1<=j<=n) [L. Theisinger].
REFERENCES
L. Theisinger, Bemerkung über die harmonische Reihe. Monatshefte für Mathematik und Physik XXVI. Jahrgang (1915), 132-134.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..30
EXAMPLE
a(4) = 1!*2!*3!*4!*H(4) = 1*2*6*24*(25/12) = 600.
MAPLE
a:= n-> mul(j^(n-j+1), j=2..n) * add(1/k, k=1..n):
seq(a(n), n=1..15); # Alois P. Heinz, Sep 21 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Franz Vrabec, Sep 21 2011
STATUS
approved