A005196 - cp's OEIS frontend

A005196 a(n) = Sum_t t*F(n,t), where F(n,t) (see A095133) is the number of forests with n (unlabeled) nodes and exactly t trees.

n	a(n)
1	1
2	3
3	6
4	13
5	24
6	49
7	93
8	190
9	381
10	803
11	1703
12	3755
13	8401
14	19338
15	45275
16	108229
17	262604
18	647083
19	1613941
20	4072198
21	10374138
22	26663390
23	69056163
24	180098668
25	472604314
26	1247159936
27	3307845730
28	8814122981
29	23585720703
30	63359160443
31	170815541708
32	462049250165

[1, 3, 6, 13, 24, 49, 93, 190, 381, 803, 1703, 3755, 8401, 19338, 45275, 108229, 262604, 647083, 1613941, 4072198, 10374138, 26663390, 69056163, 180098668, 472604314, 1247159936, 3307845730, 8814122981, 23585720703, 63359160443, 170815541708, 462049250165]

cp's OEIS Frontend

A005196 a(n) = Sum_t t*F(n,t), where F(n,t) (see A095133) is the number of forests with n (unlabeled) nodes and exactly t trees.

Table of values

List of values