A370141 - cp's OEIS frontend

A370141 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + A(x)) = 1 + 2Sum_{n>=1} x^(n(n+1)/2).

n	a(n)
1	1
2	-2
3	4
4	-8
5	14
6	-22
7	28
8	-14
9	-80
10	420
11	-1430
12	4128
13	-10798
14	26176
15	-59114
16	123442
17	-232240
18	365888
19	-355616
20	-475892
21	4318112
22	-17471288
23	56635490
24	-163101656
25	432173038
26	-1067080032
27	2456709054
28	-5216642696
29	9906435640
30	-15415122000
31	12937725806
32	33034018944
33	-238942986520

[1, -2, 4, -8, 14, -22, 28, -14, -80, 420, -1430, 4128, -10798, 26176, -59114, 123442, -232240, 365888, -355616, -475892, 4318112, -17471288, 56635490, -163101656, 432173038, -1067080032, 2456709054, -5216642696, 9906435640, -15415122000, 12937725806, 33034018944, -238942986520]

cp's OEIS Frontend

A370141 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + A(x)) = 1 + 2Sum_{n>=1} x^(n(n+1)/2).

Table of values

List of values

cp's OEIS Frontend

A370141 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + A(x)) = 1 + 2*Sum_{n>=1} x^(n*(n+1)/2).

Table of values

List of values

A370141 Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + A(x)) = 1 + 2Sum_{n>=1} x^(n(n+1)/2).