A369495 - cp's OEIS frontend

A369495 a(n) = [x^n] Product_{k=1..n} (x^(k(k+1)/2) + 1 + 1/x^(k(k+1)/2)).

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	5
6	11
7	25
8	56
9	129
10	313
11	748
12	1831
13	4584
14	11581
15	29555
16	76398
17	199191
18	522746
19	1382158
20	3676072
21	9828631
22	26412174
23	71310248
24	193346941
25	526302232
26	1437895915
27	3941671019
28	10839118898
29	29893768219
30	82671240995
31	229213877639
32	637049969282

[1, 1, 1, 2, 3, 5, 11, 25, 56, 129, 313, 748, 1831, 4584, 11581, 29555, 76398, 199191, 522746, 1382158, 3676072, 9828631, 26412174, 71310248, 193346941, 526302232, 1437895915, 3941671019, 10839118898, 29893768219, 82671240995, 229213877639, 637049969282]

cp's OEIS Frontend

A369495 a(n) = [x^n] Product_{k=1..n} (x^(k(k+1)/2) + 1 + 1/x^(k(k+1)/2)).

Table of values

List of values

cp's OEIS Frontend

A369495 a(n) = [x^n] Product_{k=1..n} (x^(k*(k+1)/2) + 1 + 1/x^(k*(k+1)/2)).

Table of values

List of values

A369495 a(n) = [x^n] Product_{k=1..n} (x^(k(k+1)/2) + 1 + 1/x^(k(k+1)/2)).