A135921 - cp's OEIS frontend

A135921 O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k(k+1)x).

n	a(n)
0	1
1	1
2	3
3	13
4	81
5	669
6	6955
7	88505
8	1346209
9	23998521
10	493956467
11	11596542533
12	307301505073
13	9110471500693
14	299893197116059
15	10888674034993905
16	433549376981078593
17	18833037527449398129
18	888439543634687700579

[1, 1, 3, 13, 81, 669, 6955, 88505, 1346209, 23998521, 493956467, 11596542533, 307301505073, 9110471500693, 299893197116059, 10888674034993905, 433549376981078593, 18833037527449398129, 888439543634687700579]

cp's OEIS Frontend

A135921 O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k(k+1)x).

Table of values

List of values

cp's OEIS Frontend

A135921 O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k*(k+1)*x).

Table of values

List of values

A135921 O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k(k+1)x).