A376735 - cp's OEIS frontend

A376735 a(n) = Sum_{k=0..floor(n/4)} (n-3k+1) binomial(n-3*k,k)^2.

n	a(n)
0	1
1	2
2	3
3	4
4	7
5	18
6	43
7	88
8	162
9	298
10	583
11	1188
12	2402
13	4722
14	9123
15	17648
16	34463
17	67632
18	132382
19	257748
20	500244
21	970790
22	1885815
23	3663816
24	7110990
25	13783264
26	26692422
27	51672484
28	100007876
29	193487262
30	374149235
31	723110880
32	1396927383
33	2697694410
34	5208058825

[1, 2, 3, 4, 7, 18, 43, 88, 162, 298, 583, 1188, 2402, 4722, 9123, 17648, 34463, 67632, 132382, 257748, 500244, 970790, 1885815, 3663816, 7110990, 13783264, 26692422, 51672484, 100007876, 193487262, 374149235, 723110880, 1396927383, 2697694410, 5208058825]

cp's OEIS Frontend

A376735 a(n) = Sum_{k=0..floor(n/4)} (n-3k+1) binomial(n-3*k,k)^2.

Table of values

List of values

cp's OEIS Frontend

A376735 a(n) = Sum_{k=0..floor(n/4)} (n-3*k+1) * binomial(n-3*k,k)^2.

Table of values

List of values

A376735 a(n) = Sum_{k=0..floor(n/4)} (n-3k+1) binomial(n-3*k,k)^2.