A319636 - cp's OEIS frontend

A319636 a(n) = Sum_{k=1..n} binomial(2n - 3k + 1, n - k)*k/(n - k + 1).

n	a(n)
0	0
1	1
2	3
3	6
4	11
5	23
6	60
7	182
8	589
9	1960
10	6641
11	22849
12	79676
13	281048
14	1001100
15	3595865
16	13009663
17	47366234
18	173415160
19	638044198
20	2357941155
21	8748646416
22	32576869239
23	121701491725
24	456012458960
25	1713339737046
26	6453584646774
27	24364925259967
28	92185136438926
29	349479503542513

[0, 1, 3, 6, 11, 23, 60, 182, 589, 1960, 6641, 22849, 79676, 281048, 1001100, 3595865, 13009663, 47366234, 173415160, 638044198, 2357941155, 8748646416, 32576869239, 121701491725, 456012458960, 1713339737046, 6453584646774, 24364925259967, 92185136438926, 349479503542513]

cp's OEIS Frontend

A319636 a(n) = Sum_{k=1..n} binomial(2n - 3k + 1, n - k)*k/(n - k + 1).

Table of values

List of values

cp's OEIS Frontend

A319636 a(n) = Sum_{k=1..n} binomial(2*n - 3*k + 1, n - k)*k/(n - k + 1).

Table of values

List of values

A319636 a(n) = Sum_{k=1..n} binomial(2n - 3k + 1, n - k)*k/(n - k + 1).