A024718 - cp's OEIS frontend

A024718 a(n) = (1/2)(1 + Sum_{k=0..n} binomial(2k, k)).

n	a(n)
0	1
1	2
2	5
3	15
4	50
5	176
6	638
7	2354
8	8789
9	33099
10	125477
11	478193
12	1830271
13	7030571
14	27088871
15	104647631
16	405187826
17	1571990936
18	6109558586
19	23782190486
20	92705454896
21	361834392116
22	1413883873976
23	5530599237776
24	21654401079326
25	84859704298202
26	332818970772254

[1, 2, 5, 15, 50, 176, 638, 2354, 8789, 33099, 125477, 478193, 1830271, 7030571, 27088871, 104647631, 405187826, 1571990936, 6109558586, 23782190486, 92705454896, 361834392116, 1413883873976, 5530599237776, 21654401079326, 84859704298202, 332818970772254]

cp's OEIS Frontend

A024718 a(n) = (1/2)(1 + Sum_{k=0..n} binomial(2k, k)).

Table of values

List of values

cp's OEIS Frontend

A024718 a(n) = (1/2)*(1 + Sum_{k=0..n} binomial(2*k, k)).

Table of values

List of values

A024718 a(n) = (1/2)(1 + Sum_{k=0..n} binomial(2k, k)).