A387553 - cp's OEIS frontend

A387553 a(n) = (1/2) * Sum_{k=0..floor(n/2)} 2^(n-k) * binomial(2k+2,2n-4*k+1).

n	a(n)
0	1
1	0
2	4
3	8
4	12
5	80
6	80
7	448
8	976
9	2176
10	8256
11	14720
12	52416
13	124672
14	313600
15	956416
16	2145536
17	6438912
18	16135168
19	42117120
20	117754880
21	290820096
22	812109824
23	2091991040
24	5519691776
25	14911766528
26	38335299584
27	103777271808
28	271034662912
29	716987629568
30	1911288823808

[1, 0, 4, 8, 12, 80, 80, 448, 976, 2176, 8256, 14720, 52416, 124672, 313600, 956416, 2145536, 6438912, 16135168, 42117120, 117754880, 290820096, 812109824, 2091991040, 5519691776, 14911766528, 38335299584, 103777271808, 271034662912, 716987629568, 1911288823808]

cp's OEIS Frontend

A387553 a(n) = (1/2) * Sum_{k=0..floor(n/2)} 2^(n-k) * binomial(2k+2,2n-4*k+1).

Table of values

List of values

cp's OEIS Frontend

A387553 a(n) = (1/2) * Sum_{k=0..floor(n/2)} 2^(n-k) * binomial(2*k+2,2*n-4*k+1).

Table of values

List of values

A387553 a(n) = (1/2) * Sum_{k=0..floor(n/2)} 2^(n-k) * binomial(2k+2,2n-4*k+1).