A387601 - cp's OEIS frontend

A387601 a(n) = (1/2) * Sum_{k=0..floor(n/4)} 2^k * binomial(2n-6k+2,2*k+1).

n	a(n)
0	1
1	2
2	3
3	4
4	9
5	26
6	63
7	128
8	241
9	486
10	1075
11	2412
12	5189
13	10770
14	22343
15	47352
16	101801
17	218142
18	462635
19	976260
20	2065741
21	4391914
22	9351823
23	19877904
24	42164785
25	89409718
26	189779059
27	403162268
28	856453269
29	1818474626
30	3859843799
31	8193466664
32	17396892537
33	36942391118

[1, 2, 3, 4, 9, 26, 63, 128, 241, 486, 1075, 2412, 5189, 10770, 22343, 47352, 101801, 218142, 462635, 976260, 2065741, 4391914, 9351823, 19877904, 42164785, 89409718, 189779059, 403162268, 856453269, 1818474626, 3859843799, 8193466664, 17396892537, 36942391118]

cp's OEIS Frontend

A387601 a(n) = (1/2) * Sum_{k=0..floor(n/4)} 2^k * binomial(2n-6k+2,2*k+1).

Table of values

List of values

cp's OEIS Frontend

A387601 a(n) = (1/2) * Sum_{k=0..floor(n/4)} 2^k * binomial(2*n-6*k+2,2*k+1).

Table of values

List of values

A387601 a(n) = (1/2) * Sum_{k=0..floor(n/4)} 2^k * binomial(2n-6k+2,2*k+1).