|
|
A141008
|
|
E.g.f. exp(sum_{d|M} (exp(d*x)-1)/d), M=12.
|
|
2
|
|
|
1, 6, 64, 930, 16780, 356922, 8681380, 236739354, 7135453180, 235079261562, 8389974421012, 322019941283514, 13211434169884204, 576435716324437722, 26631611751773999044, 1297943388416061780186
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
MATHEMATICA
|
u[0, j_]: = 1; u[k_, j_]: = u[k, j] = Sum[Binomial[k-1, i-1]Plus@@(u[k-i, j]#^(i-1)&/@Divisors[j]), {i, k}]; Table[u[n, 12], {n, 0, 30}] (* Vincenzo Librandi, Dec 12 2012 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|