A352279 - cp's OEIS frontend

A352279 a(0) = 1; a(n) = 2 * Sum_{k=0..floor((n-1)/2)} binomial(n-1,2k) a(n-2*k-1).

n	a(n)
0	1
1	2
2	4
3	10
4	32
5	114
6	448
7	1978
8	9472
9	48738
10	270336
11	1595114
12	9965568
13	65852882
14	457326592
15	3329243546
16	25356271616
17	201326396098
18	1663597019136
19	14279558011850
20	127044810702848
21	1170023757062450
22	11136610150121472
23	109395885009537402
24	1107781178494025728
25	11549900930966957346

[1, 2, 4, 10, 32, 114, 448, 1978, 9472, 48738, 270336, 1595114, 9965568, 65852882, 457326592, 3329243546, 25356271616, 201326396098, 1663597019136, 14279558011850, 127044810702848, 1170023757062450, 11136610150121472, 109395885009537402, 1107781178494025728, 11549900930966957346]

cp's OEIS Frontend

A352279 a(0) = 1; a(n) = 2 * Sum_{k=0..floor((n-1)/2)} binomial(n-1,2k) a(n-2*k-1).

Table of values

List of values

cp's OEIS Frontend

A352279 a(0) = 1; a(n) = 2 * Sum_{k=0..floor((n-1)/2)} binomial(n-1,2*k) * a(n-2*k-1).

Table of values

List of values

A352279 a(0) = 1; a(n) = 2 * Sum_{k=0..floor((n-1)/2)} binomial(n-1,2k) a(n-2*k-1).