A261682 - cp's OEIS frontend

A261682 a(n) = 2^n+(1+(n mod 2)/2)*C(n+1,floor((n+(n mod 2))/2))-1.

n	a(n)
0	1
1	4
2	6
3	16
4	25
5	61
6	98
7	232
8	381
9	889
10	1485
11	3433
12	5811
13	13339
14	22818
15	52072
16	89845
17	204001
18	354521
19	801421
20	1401291
21	3155299
22	5546381
23	12444841
24	21977515
25	49155331
26	87167163
27	194392627
28	345994215
29	769547191
30	1374282018
31	3049104232
32	5461770405
33	12090343921

[1, 4, 6, 16, 25, 61, 98, 232, 381, 889, 1485, 3433, 5811, 13339, 22818, 52072, 89845, 204001, 354521, 801421, 1401291, 3155299, 5546381, 12444841, 21977515, 49155331, 87167163, 194392627, 345994215, 769547191, 1374282018, 3049104232, 5461770405, 12090343921]

cp's OEIS Frontend

A261682 a(n) = 2^n+(1+(n mod 2)/2)*C(n+1,floor((n+(n mod 2))/2))-1.

Table of values

List of values