A172383 - cp's OEIS frontend

A172383 a(0)=1, otherwise a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n-k-1,k)a(n-1-2k).

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	8
6	19
7	46
8	118
9	322
10	903
11	2653
12	8053
13	25194
14	81387
15	269667
16	917529
17	3197480
18	11393821
19	41497060
20	154186653
21	584151512
22	2254240317
23	8852998343
24	35361762709
25	143540660088
26	591802631729
27	2476701062087

[1, 1, 1, 2, 4, 8, 19, 46, 118, 322, 903, 2653, 8053, 25194, 81387, 269667, 917529, 3197480, 11393821, 41497060, 154186653, 584151512, 2254240317, 8852998343, 35361762709, 143540660088, 591802631729, 2476701062087]

cp's OEIS Frontend

A172383 a(0)=1, otherwise a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n-k-1,k)a(n-1-2k).

Table of values

List of values

cp's OEIS Frontend

A172383 a(0)=1, otherwise a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n-k-1,k)*a(n-1-2*k).

Table of values

List of values

A172383 a(0)=1, otherwise a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n-k-1,k)a(n-1-2k).