A336815 - cp's OEIS frontend

A336815 Number of subsets of {1..n} whose sum of squares of elements is a square.

n	a(n)
0	1
1	2
2	3
3	4
4	6
5	7
6	10
7	12
8	17
9	26
10	37
11	69
12	120
13	233
14	417
15	781
16	1386
17	2561
18	4638
19	8387
20	15495
21	27709
22	51580
23	94054
24	176266
25	330004
26	618846
27	1174439
28	2216002
29	4232301
30	8041866
31	15344759
32	29258898
33	55850376
34	106792759
35	204203789
36	391147474
37	749434144
38	1439261966

[1, 2, 3, 4, 6, 7, 10, 12, 17, 26, 37, 69, 120, 233, 417, 781, 1386, 2561, 4638, 8387, 15495, 27709, 51580, 94054, 176266, 330004, 618846, 1174439, 2216002, 4232301, 8041866, 15344759, 29258898, 55850376, 106792759, 204203789, 391147474, 749434144, 1439261966]

cp's OEIS Frontend

A336815 Number of subsets of {1..n} whose sum of squares of elements is a square.

Table of values

List of values