A180717 - cp's OEIS frontend

A180717 G.f.: Sum_{n>=0} [Sum_{k=0..n} C(n,k)^2x^k]^2 x^n.

n	a(n)
0	1
1	1
2	3
3	10
4	37
5	140
6	544
7	2181
8	8873
9	36647
10	152950
11	644313
12	2734648
13	11681428
14	50173541
15	216532005
16	938383331
17	4081653710
18	17811999929
19	77957939080
20	342099306436
21	1504801777973
22	6633574235109
23	29300516237855

[1, 1, 3, 10, 37, 140, 544, 2181, 8873, 36647, 152950, 644313, 2734648, 11681428, 50173541, 216532005, 938383331, 4081653710, 17811999929, 77957939080, 342099306436, 1504801777973, 6633574235109, 29300516237855]

cp's OEIS Frontend

A180717 G.f.: Sum_{n>=0} [Sum_{k=0..n} C(n,k)^2x^k]^2 x^n.

Table of values

List of values

cp's OEIS Frontend

A180717 G.f.: Sum_{n>=0} [Sum_{k=0..n} C(n,k)^2*x^k]^2 * x^n.

Table of values

List of values

A180717 G.f.: Sum_{n>=0} [Sum_{k=0..n} C(n,k)^2x^k]^2 x^n.