OFFSET
0,3
COMMENTS
Denominators of the INVERT transform of reciprocal integers.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..506
FORMULA
a(n) = denominator( A007840(n)/n! ).
MAPLE
b:= proc(n) option remember;
`if`(n=0, 1, add(b(n-j)/j, j=1..n))
end:
a:= n-> denom(b(n)):
seq(a(n), n=0..25);
MATHEMATICA
nmax = 20; Denominator[CoefficientList[Series[1/(1 + Log[1-x]), {x, 0, nmax}], x]] (* Vaclav Kotesovec, Feb 12 2024 *)
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Alois P. Heinz, Jan 11 2019
STATUS
approved