A369494 - cp's OEIS frontend

A369494 a(n) = [x^(n(n+1)/2)] Product_{k=1..n} (x^(k(k+1)/2) + 1/x^(k*(k+1)/2)).

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	2
6	0
7	3
8	3
9	5
10	0
11	14
12	23
13	39
14	0
15	101
16	161
17	315
18	0
19	971
20	1595
21	2872
22	0
23	9697
24	17431
25	31736
26	0
27	103608
28	190242
29	356883
30	0
31	1218049
32	2235343
33	4165201
34	0
35	14602056
36	27304610
37	51182196
38	0
39	179995388
40	339041695
41	640927871
42	0
43	2288387318
44	4326722468
45	8201714149

[1, 1, 0, 0, 0, 2, 0, 3, 3, 5, 0, 14, 23, 39, 0, 101, 161, 315, 0, 971, 1595, 2872, 0, 9697, 17431, 31736, 0, 103608, 190242, 356883, 0, 1218049, 2235343, 4165201, 0, 14602056, 27304610, 51182196, 0, 179995388, 339041695, 640927871, 0, 2288387318, 4326722468, 8201714149]

cp's OEIS Frontend

A369494 a(n) = [x^(n(n+1)/2)] Product_{k=1..n} (x^(k(k+1)/2) + 1/x^(k*(k+1)/2)).

Table of values

List of values

cp's OEIS Frontend

A369494 a(n) = [x^(n*(n+1)/2)] Product_{k=1..n} (x^(k*(k+1)/2) + 1/x^(k*(k+1)/2)).

Table of values

List of values

A369494 a(n) = [x^(n(n+1)/2)] Product_{k=1..n} (x^(k(k+1)/2) + 1/x^(k*(k+1)/2)).