OFFSET
0,3
COMMENTS
i.e. the sequence remains unchanged.
Contribution from Gary W. Adamson, Jul 08 2010: (Start)
Let B(x) = (1 + x + 2x^2 + 5x^3 + 15x^4 + ...), Bell numbers, A000110; and
A(x) = (1 + x + 3x^2 + 6x^3 + 20x^4 + ...). Then A(x) = B(x) * B(x^2) *
B(x^4) * B(x^8) * ...; and B(x) = A(x)/A(x^2). (End)
FORMULA
CROSSREFS
KEYWORD
nonn
AUTHOR
Gary W. Adamson, Feb 09 2010
STATUS
approved