A387485 - cp's OEIS frontend

A387485 a(n) = Sum_{k=0..floor(n/3)} 2^(n-2k) binomial(k,n-3*k)^2.

n	a(n)
0	1
1	0
2	0
3	2
4	4
5	0
6	4
7	32
8	16
9	8
10	144
11	288
12	80
13	512
14	2304
15	2080
16	1856
17	12800
18	25664
19	17408
20	58624
21	204928
22	242944
23	299520
24	1258752
25	2541568
26	2609152
27	6824448
28	20169728
29	28344320
30	41747456
31	132358144
32	268472320
33	349177856
34	807964672
35	2116296704
36	3336458240

[1, 0, 0, 2, 4, 0, 4, 32, 16, 8, 144, 288, 80, 512, 2304, 2080, 1856, 12800, 25664, 17408, 58624, 204928, 242944, 299520, 1258752, 2541568, 2609152, 6824448, 20169728, 28344320, 41747456, 132358144, 268472320, 349177856, 807964672, 2116296704, 3336458240]

cp's OEIS Frontend

A387485 a(n) = Sum_{k=0..floor(n/3)} 2^(n-2k) binomial(k,n-3*k)^2.

Table of values

List of values

cp's OEIS Frontend

A387485 a(n) = Sum_{k=0..floor(n/3)} 2^(n-2*k) * binomial(k,n-3*k)^2.

Table of values

List of values

A387485 a(n) = Sum_{k=0..floor(n/3)} 2^(n-2k) binomial(k,n-3*k)^2.