A387516 - cp's OEIS frontend

A387516 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3k) binomial(k,n-3*k)^2.

n	a(n)
0	1
1	0
2	0
3	1
4	2
5	0
6	1
7	8
8	4
9	1
10	18
11	36
12	9
13	32
14	144
15	129
16	66
17	400
18	801
19	472
20	932
21	3201
22	3698
23	2916
24	9865
25	19728
26	17248
27	28225
28	78690
29	105536
30	106625
31	262408
32	516388
33	566785
34	871730
35	2064964
36	3040713
37	3585888
38	7366032
39	14098817
40	17860962
41	27066384
42	56844833
43	88593688

[1, 0, 0, 1, 2, 0, 1, 8, 4, 1, 18, 36, 9, 32, 144, 129, 66, 400, 801, 472, 932, 3201, 3698, 2916, 9865, 19728, 17248, 28225, 78690, 105536, 106625, 262408, 516388, 566785, 871730, 2064964, 3040713, 3585888, 7366032, 14098817, 17860962, 27066384, 56844833, 88593688]

cp's OEIS Frontend

A387516 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3k) binomial(k,n-3*k)^2.

Table of values

List of values

cp's OEIS Frontend

A387516 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3*k) * binomial(k,n-3*k)^2.

Table of values

List of values

A387516 a(n) = Sum_{k=0..floor(n/3)} 2^(n-3k) binomial(k,n-3*k)^2.