A181522 - cp's OEIS frontend

A181522 Number of subsets of {1,2,...,n} whose sum is semiprime (cf. A001358, A064911).

n	a(n)
1	0
2	0
3	2
4	6
5	13
6	25
7	47
8	92
9	184
10	367
11	721
12	1416
13	2769
14	5407
15	10662
16	21135
17	41866
18	83220
19	166617
20	334852
21	670725
22	1334868
23	2650263
24	5280475
25	10567613
26	21145411
27	42103939
28	83382359
29	164843079
30	326791838
31	650995628
32	1301718424
33	2605360702
34	5205671338
35	10369588530

[0, 0, 2, 6, 13, 25, 47, 92, 184, 367, 721, 1416, 2769, 5407, 10662, 21135, 41866, 83220, 166617, 334852, 670725, 1334868, 2650263, 5280475, 10567613, 21145411, 42103939, 83382359, 164843079, 326791838, 650995628, 1301718424, 2605360702, 5205671338, 10369588530]

cp's OEIS Frontend

A181522 Number of subsets of {1,2,...,n} whose sum is semiprime (cf. A001358, A064911).

Table of values

List of values