A359066 - cp's OEIS frontend

A359066 a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,k)*binomial(n-1-k,floor((n-1)/2) - k).

n	a(n)
1	1
2	1
3	5
4	7
5	31
6	49
7	209
8	351
9	1471
10	2561
11	10625
12	18943
13	78079
14	141569
15	580865
16	1066495
17	4361215
18	8085505
19	32978945
20	61616127
21	250806271
22	471556097
23	1916280833
24	3621830655
25	14698053631
26	27902803969
27	113104519169
28	215530668031
29	872801042431
30	1668644405249
31	6751535300609

[1, 1, 5, 7, 31, 49, 209, 351, 1471, 2561, 10625, 18943, 78079, 141569, 580865, 1066495, 4361215, 8085505, 32978945, 61616127, 250806271, 471556097, 1916280833, 3621830655, 14698053631, 27902803969, 113104519169, 215530668031, 872801042431, 1668644405249, 6751535300609]

cp's OEIS Frontend

A359066 a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,k)*binomial(n-1-k,floor((n-1)/2) - k).

Table of values

List of values