A370142 - cp's OEIS frontend

A370142 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 2A(x)) = 1 + 3Sum_{n>=1} x^(n*(n+1)/2).

n	a(n)
1	1
2	-3
3	9
4	-27
5	78
6	-219
7	591
8	-1500
9	3420
10	-6153
11	3315
12	44466
13	-324276
14	1627002
15	-7069893
16	28345875
17	-107618916
18	391749108
19	-1375531170
20	4669215090
21	-15311251593
22	48316101369
23	-145501913850
24	411323278248
25	-1053727809204
26	2226156968586
27	-2433380638410
28	-10543933246791

[1, -3, 9, -27, 78, -219, 591, -1500, 3420, -6153, 3315, 44466, -324276, 1627002, -7069893, 28345875, -107618916, 391749108, -1375531170, 4669215090, -15311251593, 48316101369, -145501913850, 411323278248, -1053727809204, 2226156968586, -2433380638410, -10543933246791]

cp's OEIS Frontend

A370142 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 2A(x)) = 1 + 3Sum_{n>=1} x^(n*(n+1)/2).

Table of values

List of values

cp's OEIS Frontend

A370142 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 2*A(x)) = 1 + 3*Sum_{n>=1} x^(n*(n+1)/2).

Table of values

List of values

A370142 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 2A(x)) = 1 + 3Sum_{n>=1} x^(n*(n+1)/2).