A321381 - cp's OEIS frontend

A321381 Expansion of 1/2 * Product_{i>=0, j>=0, k>=0} (1 + x^(i^2 + j^2 + k^2)).

n	a(n)
0	1
1	3
2	6
3	11
4	18
5	33
6	59
7	96
8	150
9	230
10	357
11	552
12	825
13	1203
14	1749
15	2541
16	3666
17	5208
18	7302
19	10212
20	14250
21	19738
22	27093
23	36936
24	50203
25	68034
26	91665
27	122763
28	163731
29	217740
30	288621
31	380922
32	500652
33	655987
34	857226
35	1116798
36	1450138
37	1877232
38	2423892
39	3122094
40	4010883
41	5139132

[1, 3, 6, 11, 18, 33, 59, 96, 150, 230, 357, 552, 825, 1203, 1749, 2541, 3666, 5208, 7302, 10212, 14250, 19738, 27093, 36936, 50203, 68034, 91665, 122763, 163731, 217740, 288621, 380922, 500652, 655987, 857226, 1116798, 1450138, 1877232, 2423892, 3122094, 4010883, 5139132]

cp's OEIS Frontend

A321381 Expansion of 1/2 * Product_{i>=0, j>=0, k>=0} (1 + x^(i^2 + j^2 + k^2)).

Table of values

List of values