A369577 - cp's OEIS frontend

A369577 a(n) = [x^n] Product_{j=1..n, k=1..n} 1/(1 - x^(k^j)).

n	a(n)
0	1
1	1
2	4
3	14
4	52
5	193
6	724
7	2736
8	10404
9	39759
10	152555
11	587323
12	2267578
13	8776197
14	34038411
15	132262696
16	514774705
17	2006461961
18	7830924282
19	30599035846
20	119692591204
21	468651774760
22	1836626054421
23	7203559635483
24	28274941506056
25	111060542576799
26	436515284729667

[1, 1, 4, 14, 52, 193, 724, 2736, 10404, 39759, 152555, 587323, 2267578, 8776197, 34038411, 132262696, 514774705, 2006461961, 7830924282, 30599035846, 119692591204, 468651774760, 1836626054421, 7203559635483, 28274941506056, 111060542576799, 436515284729667]

cp's OEIS Frontend

A369577 a(n) = [x^n] Product_{j=1..n, k=1..n} 1/(1 - x^(k^j)).

Table of values

List of values