A387652 - cp's OEIS frontend

A387652 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3k) binomial(2k+1,2n-6*k+1).

n	a(n)
0	1
1	0
2	0
3	3
4	2
5	0
6	5
7	20
8	4
9	7
10	70
11	84
12	17
13	168
14	504
15	299
16	346
17	1848
18	2653
19	1452
20	5180
21	13743
22	12350
23	14508
24	51561
25	81440
26	68432
27	162323
28	391026
29	442544
30	555445
31	1498116
32	2500276
33	2666711
34	5202550
35	11465284
36	14985153
37	20025432
38	45011176
39	77173371
40	95454666
41	168802152

[1, 0, 0, 3, 2, 0, 5, 20, 4, 7, 70, 84, 17, 168, 504, 299, 346, 1848, 2653, 1452, 5180, 13743, 12350, 14508, 51561, 81440, 68432, 162323, 391026, 442544, 555445, 1498116, 2500276, 2666711, 5202550, 11465284, 14985153, 20025432, 45011176, 77173371, 95454666, 168802152]

cp's OEIS Frontend

A387652 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3k) binomial(2k+1,2n-6*k+1).

Table of values

List of values

cp's OEIS Frontend

A387652 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3*k) * binomial(2*k+1,2*n-6*k+1).

Table of values

List of values

A387652 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3k) binomial(2k+1,2n-6*k+1).