OFFSET
1,2
LINKS
N. J. A. Sloane, Transforms
Eric Weisstein's World of Mathematics, Series Reversion
FORMULA
G.f. A(x) satisfies: A(x) + 4*A(x)^2 + 6*A(x)^3 + 8*A(x)^4 + 9*A(x)^5 + 10*A(x)^6 + 12*A(x)^7 + ... = x.
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Aug 25 2017
STATUS
approved