A386836 - cp's OEIS frontend

A386836 a(n) = Sum_{k=0..n} binomial(3n+2,k) binomial(3*n-k-1,n-k).

n	a(n)
0	1
1	7
2	70
3	782
4	9199
5	111465
6	1376764
7	17234600
8	217891693
9	2775766091
10	35574777154
11	458169648722
12	5924747347835
13	76876586813629
14	1000418599504408
15	13051488907037580
16	170643358430006553
17	2235400439909584575
18	29333436132847784062
19	385507257723471794774
20	5073372058467119928391

[1, 7, 70, 782, 9199, 111465, 1376764, 17234600, 217891693, 2775766091, 35574777154, 458169648722, 5924747347835, 76876586813629, 1000418599504408, 13051488907037580, 170643358430006553, 2235400439909584575, 29333436132847784062, 385507257723471794774, 5073372058467119928391]

cp's OEIS Frontend

A386836 a(n) = Sum_{k=0..n} binomial(3n+2,k) binomial(3*n-k-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A386836 a(n) = Sum_{k=0..n} binomial(3*n+2,k) * binomial(3*n-k-1,n-k).

Table of values

List of values

A386836 a(n) = Sum_{k=0..n} binomial(3n+2,k) binomial(3*n-k-1,n-k).