A369578 - cp's OEIS frontend

A369578 a(n) = [x^n] Product_{j=1..n, k=1..n} (1 + x^(k^j)).

n	a(n)
0	1
1	1
2	2
3	5
4	13
5	33
6	81
7	194
8	458
9	1074
10	2513
11	5876
12	13722
13	31961
14	74168
15	171395
16	394450
17	904393
18	2066770
19	4709538
20	10704306
21	24273709
22	54926658
23	124036675
24	279559571
25	628906790
26	1412254773
27	3165780760
28	7084607367
29	15828666526
30	35309625162
31	78648201835
32	174927430681

[1, 1, 2, 5, 13, 33, 81, 194, 458, 1074, 2513, 5876, 13722, 31961, 74168, 171395, 394450, 904393, 2066770, 4709538, 10704306, 24273709, 54926658, 124036675, 279559571, 628906790, 1412254773, 3165780760, 7084607367, 15828666526, 35309625162, 78648201835, 174927430681]

cp's OEIS Frontend

A369578 a(n) = [x^n] Product_{j=1..n, k=1..n} (1 + x^(k^j)).

Table of values

List of values