A278406 - cp's OEIS frontend

A278406 G.f.: x^2 * f''(x), where f(x) = Product_{k>=1} 1 / (1 - x^k).

n	a(n)
0	0
1	0
2	4
3	18
4	60
5	140
6	330
7	630
8	1232
9	2160
10	3780
11	6160
12	10164
13	15756
14	24570
15	36960
16	55440
17	80784
18	117810
19	167580
20	238260
21	332640
22	462924
23	635030
24	869400
25	1174800
26	1583400
27	2113020
28	2810808
29	3706780
30	4875480
31	6363060
32	8282208
33	10711008
34	13811820
35	17710770

[0, 0, 4, 18, 60, 140, 330, 630, 1232, 2160, 3780, 6160, 10164, 15756, 24570, 36960, 55440, 80784, 117810, 167580, 238260, 332640, 462924, 635030, 869400, 1174800, 1583400, 2113020, 2810808, 3706780, 4875480, 6363060, 8282208, 10711008, 13811820, 17710770]

cp's OEIS Frontend

A278406 G.f.: x^2 * f''(x), where f(x) = Product_{k>=1} 1 / (1 - x^k).

Table of values

List of values