A386869 - cp's OEIS frontend

A386869 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(3n+2,k) binomial(3*n-k,n-k).

n	a(n)
0	1
1	11
2	168
3	2839
4	50333
5	917604
6	17036260
7	320383295
8	6082829067
9	116342007859
10	2238247173440
11	43266114873636
12	839661737871388
13	16349646755219432
14	319263686177979564
15	6249714381417109903
16	122603983720769666087
17	2409746305286188995681

[1, 11, 168, 2839, 50333, 917604, 17036260, 320383295, 6082829067, 116342007859, 2238247173440, 43266114873636, 839661737871388, 16349646755219432, 319263686177979564, 6249714381417109903, 122603983720769666087, 2409746305286188995681]

cp's OEIS Frontend

A386869 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(3n+2,k) binomial(3*n-k,n-k).

Table of values

List of values

cp's OEIS Frontend

A386869 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(3*n+2,k) * binomial(3*n-k,n-k).

Table of values

List of values

A386869 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(3n+2,k) binomial(3*n-k,n-k).