A387626 - cp's OEIS frontend

A387626 a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2n-6k+1,2*k).

n	a(n)
0	1
1	1
2	1
3	1
4	7
5	21
6	43
7	73
8	131
9	297
10	715
11	1593
12	3259
13	6553
14	13723
15	29833
16	64827
17	137881
18	289179
19	608329
20	1293083
21	2762457
22	5885179
23	12478601
24	26418363
25	56028761
26	119072987
27	253139017
28	537620571
29	1140840793
30	2420927291
31	5139947401
32	10916332411
33	23182447833

[1, 1, 1, 1, 7, 21, 43, 73, 131, 297, 715, 1593, 3259, 6553, 13723, 29833, 64827, 137881, 289179, 608329, 1293083, 2762457, 5885179, 12478601, 26418363, 56028761, 119072987, 253139017, 537620571, 1140840793, 2420927291, 5139947401, 10916332411, 23182447833]

cp's OEIS Frontend

A387626 a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2n-6k+1,2*k).

Table of values

List of values

cp's OEIS Frontend

A387626 a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2*n-6*k+1,2*k).

Table of values

List of values

A387626 a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2n-6k+1,2*k).