A327940 - cp's OEIS frontend

A327940 Expansion of e.g.f. exp(Sum_{i>=1} Sum_{j=1..i-1} x^(ij) / (ij)).

n	a(n)
0	1
1	0
2	1
3	2
4	9
5	44
6	385
7	1854
8	23233
9	153656
10	2151441
11	18787130
12	338487721
13	3165541092
14	60609811249
15	835202858294
16	14913805143105
17	228441779869424
18	5319673396479073
19	81040768940877426
20	2153026504862728201
21	39759334398324543260
22	988919906784578473761

[1, 0, 1, 2, 9, 44, 385, 1854, 23233, 153656, 2151441, 18787130, 338487721, 3165541092, 60609811249, 835202858294, 14913805143105, 228441779869424, 5319673396479073, 81040768940877426, 2153026504862728201, 39759334398324543260, 988919906784578473761]

cp's OEIS Frontend

A327940 Expansion of e.g.f. exp(Sum_{i>=1} Sum_{j=1..i-1} x^(ij) / (ij)).

Table of values

List of values

cp's OEIS Frontend

A327940 Expansion of e.g.f. exp(Sum_{i>=1} Sum_{j=1..i-1} x^(i*j) / (i*j)).

Table of values

List of values

A327940 Expansion of e.g.f. exp(Sum_{i>=1} Sum_{j=1..i-1} x^(ij) / (ij)).