|
|
A032216
|
|
"DFK" (bracelet, size, unlabeled) transform of 1,2,3,4...
|
|
1
|
|
|
1, 1, 2, 5, 7, 15, 25, 43, 64, 120, 234, 348, 615, 995, 1817, 4060, 6039, 10505, 17947, 30268, 52289, 122862, 175180, 311547, 502859, 860833, 1359388, 2391385, 5262510, 7592091, 12992464, 20881955, 34210817, 54117104
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
PROG
|
(PARI) seq(n)={apply(p->subst(serlaplace(p/y + polcoeff(p, 1) + polcoeff(p, 2)), y, 1)/2, Vec(y-1+prod(k=1, n, 1 + k*x^k*y + O(x*x^n))))} \\ Andrew Howroyd, Jun 21 2018
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|