A232687 - cp's OEIS frontend

A232687 G.f. A(x) satisfies: the sum of the coefficients of x^k, k=0..n, in A(x)^n equals Sum_{k=0..n} C(n,k)^3 = A000172(n) (Franel numbers), for n>=0.

n	a(n)
0	1
1	1
2	3
3	7
4	20
5	66
6	244
7	980
8	4182
9	18674
10	86353
11	410541
12	1996214
13	9888844
14	49760925
15	253767097
16	1309154825
17	6822023553
18	35865392690
19	190038440422
20	1014015337209
21	5444707218851
22	29401289997403
23	159584901816255
24	870267544114291
25	4766246752344215
26	26206635040151511

[1, 1, 3, 7, 20, 66, 244, 980, 4182, 18674, 86353, 410541, 1996214, 9888844, 49760925, 253767097, 1309154825, 6822023553, 35865392690, 190038440422, 1014015337209, 5444707218851, 29401289997403, 159584901816255, 870267544114291, 4766246752344215, 26206635040151511]

cp's OEIS Frontend

A232687 G.f. A(x) satisfies: the sum of the coefficients of x^k, k=0..n, in A(x)^n equals Sum_{k=0..n} C(n,k)^3 = A000172(n) (Franel numbers), for n>=0.

Table of values

List of values