A006172 - cp's OEIS frontend

A006172 a(n) = 1 + F(2n+1) + (-1)^nL(n).

n	a(n)
0	4
1	2
2	9
3	10
4	42
5	79
6	252
7	582
8	1645
9	4106
10	11070
11	28459
12	75348
13	195898
14	515073
15	1344906
16	3526786
17	9223895
18	24163596
19	63236638
20	165595269
21	433469962
22	1134942774
23	2971150995
24	7778845732
25	20364843314
26	53316562617
27	139583423242
28	365436006810
29	956720876191
30	2504732642460

[4, 2, 9, 10, 42, 79, 252, 582, 1645, 4106, 11070, 28459, 75348, 195898, 515073, 1344906, 3526786, 9223895, 24163596, 63236638, 165595269, 433469962, 1134942774, 2971150995, 7778845732, 20364843314, 53316562617, 139583423242, 365436006810, 956720876191, 2504732642460]

cp's OEIS Frontend

A006172 a(n) = 1 + F(2n+1) + (-1)^nL(n).

Table of values

List of values

cp's OEIS Frontend

A006172 a(n) = 1 + F(2*n+1) + (-1)^n*L(n).

Table of values

List of values

A006172 a(n) = 1 + F(2n+1) + (-1)^nL(n).