A371827 - cp's OEIS frontend

A371827 a(n) = Sum_{k=0..floor(n/3)} n^k * binomial(2n-2k,n-3*k).

n	a(n)
0	1
1	2
2	6
3	23
4	94
5	392
6	1680
7	7387
8	33110
9	150905
10	698996
11	3287550
12	15685420
13	75877427
14	371994692
15	1847450970
16	9290557158
17	47291312897
18	243574276884
19	1268915237141
20	6683909556420
21	35585631836229
22	191433293140656
23	1040197718292138
24	5707318227692796

[1, 2, 6, 23, 94, 392, 1680, 7387, 33110, 150905, 698996, 3287550, 15685420, 75877427, 371994692, 1847450970, 9290557158, 47291312897, 243574276884, 1268915237141, 6683909556420, 35585631836229, 191433293140656, 1040197718292138, 5707318227692796]

cp's OEIS Frontend

A371827 a(n) = Sum_{k=0..floor(n/3)} n^k * binomial(2n-2k,n-3*k).

Table of values

List of values

cp's OEIS Frontend

A371827 a(n) = Sum_{k=0..floor(n/3)} n^k * binomial(2*n-2*k,n-3*k).

Table of values

List of values

A371827 a(n) = Sum_{k=0..floor(n/3)} n^k * binomial(2n-2k,n-3*k).