A030033 - cp's OEIS frontend

A030033 a(n+1) = Sum_{k = 0..floor(2n/3)} a(k)a(n-k) for n >= 0 with a(0) = 1.

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	7
6	15
7	34
8	72
9	165
10	387
11	861
12	2039
13	4894
14	11256
15	27085
16	66021
17	156347
18	381720
19	940211
20	2261208
21	5578659
22	13846756
23	33654950
24	83539418
25	208608556
26	512069441
27	1278522424
28	3207377196
29	7925966000

[1, 1, 1, 2, 4, 7, 15, 34, 72, 165, 387, 861, 2039, 4894, 11256, 27085, 66021, 156347, 381720, 940211, 2261208, 5578659, 13846756, 33654950, 83539418, 208608556, 512069441, 1278522424, 3207377196, 7925966000]

cp's OEIS Frontend

A030033 a(n+1) = Sum_{k = 0..floor(2n/3)} a(k)a(n-k) for n >= 0 with a(0) = 1.

Table of values

List of values

cp's OEIS Frontend

A030033 a(n+1) = Sum_{k = 0..floor(2*n/3)} a(k)*a(n-k) for n >= 0 with a(0) = 1.

Table of values

List of values

A030033 a(n+1) = Sum_{k = 0..floor(2n/3)} a(k)a(n-k) for n >= 0 with a(0) = 1.