A385670 - cp's OEIS frontend

A385670 a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(3n+1,k) binomial(3*n-k,n-k).

n	a(n)
0	1
1	17
2	429
3	12048
4	355501
5	10792737
6	333781044
7	10457735928
8	330823760061
9	10543365694707
10	338004221112309
11	10887987584565108
12	352127854740967596
13	11426385227977214252
14	371844089088280093224
15	12130745906826301055088
16	396599383187880024765981

[1, 17, 429, 12048, 355501, 10792737, 333781044, 10457735928, 330823760061, 10543365694707, 338004221112309, 10887987584565108, 352127854740967596, 11426385227977214252, 371844089088280093224, 12130745906826301055088, 396599383187880024765981]

cp's OEIS Frontend

A385670 a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(3n+1,k) binomial(3*n-k,n-k).

Table of values

List of values

cp's OEIS Frontend

A385670 a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(3*n+1,k) * binomial(3*n-k,n-k).

Table of values

List of values

A385670 a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(3n+1,k) binomial(3*n-k,n-k).