A369560 - cp's OEIS frontend

A369560 a(n) = [x^n] Product_{k=1..n} (x^prime(k) + 1 + 1/x^prime(k)).

n	a(n)
0	1
1	0
2	1
3	2
4	3
5	6
6	16
7	38
8	91
9	225
10	547
11	1407
12	3570
13	9250
14	24578
15	65740
16	175626
17	470084
18	1279101
19	3482419
20	9547953
21	26445796
22	73251187
23	203818706
24	567543095
25	1577629707
26	4408095456
27	12400615844
28	34995570604
29	99241500366
30	282037360250
31	795846583187

[1, 0, 1, 2, 3, 6, 16, 38, 91, 225, 547, 1407, 3570, 9250, 24578, 65740, 175626, 470084, 1279101, 3482419, 9547953, 26445796, 73251187, 203818706, 567543095, 1577629707, 4408095456, 12400615844, 34995570604, 99241500366, 282037360250, 795846583187]

cp's OEIS Frontend

A369560 a(n) = [x^n] Product_{k=1..n} (x^prime(k) + 1 + 1/x^prime(k)).

Table of values

List of values