A350249 - cp's OEIS frontend

A350249 a(n) is the constant term in expansion of Product_{k=1..n} (x^(k^2) + 1 + 1/x^(k^2)).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	3
6	7
7	19
8	43
9	95
10	189
11	429
12	1003
13	2457
14	6319
15	16165
16	41601
17	107969
18	280253
19	737065
20	1950865
21	5201941
22	13954313
23	37593679
24	101695957
25	276296549
26	753191093
27	2061201397
28	5658850121
29	15583938539
30	43040609115
31	119182143639
32	330841253283
33	920550527585

[1, 1, 1, 1, 1, 3, 7, 19, 43, 95, 189, 429, 1003, 2457, 6319, 16165, 41601, 107969, 280253, 737065, 1950865, 5201941, 13954313, 37593679, 101695957, 276296549, 753191093, 2061201397, 5658850121, 15583938539, 43040609115, 119182143639, 330841253283, 920550527585]

cp's OEIS Frontend

A350249 a(n) is the constant term in expansion of Product_{k=1..n} (x^(k^2) + 1 + 1/x^(k^2)).

Table of values

List of values