A198891 - cp's OEIS frontend

A198891 Expansion of e.g.f. 1 / [ Sum_{n>=0} (-x)^(n(n+1)/2) / (n(n+1)/2)! ].

n	a(n)
0	1
1	1
2	2
3	7
4	32
5	180
6	1219
7	9646
8	87192
9	886536
10	10016159
11	124481258
12	1687686528
13	24787991800
14	392081193504
15	6644677619581
16	120115898158288
17	2307044712629472
18	46917527736860976
19	1007152702625923440
20	22757886107313170356
21	539955309450787483261
22	13421068671117864869156

[1, 1, 2, 7, 32, 180, 1219, 9646, 87192, 886536, 10016159, 124481258, 1687686528, 24787991800, 392081193504, 6644677619581, 120115898158288, 2307044712629472, 46917527736860976, 1007152702625923440, 22757886107313170356, 539955309450787483261, 13421068671117864869156]

cp's OEIS Frontend

A198891 Expansion of e.g.f. 1 / [ Sum_{n>=0} (-x)^(n(n+1)/2) / (n(n+1)/2)! ].

Table of values

List of values

cp's OEIS Frontend

A198891 Expansion of e.g.f. 1 / [ Sum_{n>=0} (-x)^(n*(n+1)/2) / (n*(n+1)/2)! ].

Table of values

List of values

A198891 Expansion of e.g.f. 1 / [ Sum_{n>=0} (-x)^(n(n+1)/2) / (n(n+1)/2)! ].