A386899 - cp's OEIS frontend

A386899 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3n+1,k) binomial(2*n-k,n-k).

n	a(n)
0	1
1	16
2	339
3	7840
4	189295
5	4689216
6	118155156
7	3013479744
8	77557234095
9	2010176842960
10	52394920516939
11	1371957494204544
12	36062378503314436
13	950984592573500800
14	25147592297769065400
15	666594977732384307840
16	17706778517771676847215
17	471217399398861925667760

[1, 16, 339, 7840, 189295, 4689216, 118155156, 3013479744, 77557234095, 2010176842960, 52394920516939, 1371957494204544, 36062378503314436, 950984592573500800, 25147592297769065400, 666594977732384307840, 17706778517771676847215, 471217399398861925667760]

cp's OEIS Frontend

A386899 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3n+1,k) binomial(2*n-k,n-k).

Table of values

List of values

cp's OEIS Frontend

A386899 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3*n+1,k) * binomial(2*n-k,n-k).

Table of values

List of values

A386899 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3n+1,k) binomial(2*n-k,n-k).