A205803 - cp's OEIS frontend

A205803 E.g.f.: -log( Sum_{n>=0} (-x)^(n(n+1)/2) / (n(n+1)/2)! ).

n	a(n)
1	1
2	1
3	3
4	10
5	44
6	249
7	1693
8	13384
9	120932
10	1229759
11	13894429
12	172677450
13	2341111850
14	34385290940
15	543885462121
16	9217332132024
17	166621796893824
18	3200275345024464
19	65082833538054240
20	1397097303096855578
21	31569176387677926733
22	749012642530028865010

[1, 1, 3, 10, 44, 249, 1693, 13384, 120932, 1229759, 13894429, 172677450, 2341111850, 34385290940, 543885462121, 9217332132024, 166621796893824, 3200275345024464, 65082833538054240, 1397097303096855578, 31569176387677926733, 749012642530028865010]

cp's OEIS Frontend

A205803 E.g.f.: -log( Sum_{n>=0} (-x)^(n(n+1)/2) / (n(n+1)/2)! ).

Table of values

List of values

cp's OEIS Frontend

A205803 E.g.f.: -log( Sum_{n>=0} (-x)^(n*(n+1)/2) / (n*(n+1)/2)! ).

Table of values

List of values

A205803 E.g.f.: -log( Sum_{n>=0} (-x)^(n(n+1)/2) / (n(n+1)/2)! ).