A318493 - cp's OEIS frontend

A318493 Expansion of 1/(1 - Sum_{i>=1, j>=1} ijx^(i*j)).

n	a(n)
0	1
1	1
2	5
3	15
4	53
5	165
6	561
7	1807
8	5993
9	19586
10	64491
11	211466
12	695101
13	2281614
14	7494995
15	24610588
16	80829373
17	265437828
18	871738976
19	2862815763
20	9401768055
21	30875971366
22	101399191222
23	333001988025
24	1093603789613
25	3591473940515
26	11794667169894
27	38734550365835
28	127207121681103
29	417757532953031

[1, 1, 5, 15, 53, 165, 561, 1807, 5993, 19586, 64491, 211466, 695101, 2281614, 7494995, 24610588, 80829373, 265437828, 871738976, 2862815763, 9401768055, 30875971366, 101399191222, 333001988025, 1093603789613, 3591473940515, 11794667169894, 38734550365835, 127207121681103, 417757532953031]

cp's OEIS Frontend

A318493 Expansion of 1/(1 - Sum_{i>=1, j>=1} ijx^(i*j)).

Table of values

List of values

cp's OEIS Frontend

A318493 Expansion of 1/(1 - Sum_{i>=1, j>=1} i*j*x^(i*j)).

Table of values

List of values

A318493 Expansion of 1/(1 - Sum_{i>=1, j>=1} ijx^(i*j)).