OFFSET
1,1
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
C. G. Bower, Transforms (2)
FORMULA
Doubles (index 2+) under "BHK" (reversible, identity, unlabeled) transform.
PROG
(PARI)
BHK(p)={p + (1/(1-p) - (1+p)/subst(1-p, x, x^2))/2}
seq(n)={my(p=2*x); for(i=2, n, p+=x^i*polcoeff(BHK(p) + O(x*x^i), i)); Vecrev(p/x)} \\ Andrew Howroyd, Aug 30 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved