A386867 - cp's OEIS frontend

A386867 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(4n+2,k) binomial(4*n-k-1,n-k).

n	a(n)
0	1
1	12
2	249
3	5842
4	144636
5	3690840
6	96028606
7	2532467934
8	67454242092
9	1810467982144
10	48887478311673
11	1326582594222918
12	36143786784056716
13	988134308856642048
14	27093384379207568028
15	744735869371387679158
16	20516019688758402141372
17	566266846186568482197840

[1, 12, 249, 5842, 144636, 3690840, 96028606, 2532467934, 67454242092, 1810467982144, 48887478311673, 1326582594222918, 36143786784056716, 988134308856642048, 27093384379207568028, 744735869371387679158, 20516019688758402141372, 566266846186568482197840]

cp's OEIS Frontend

A386867 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(4n+2,k) binomial(4*n-k-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A386867 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(4*n+2,k) * binomial(4*n-k-1,n-k).

Table of values

List of values

A386867 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(4n+2,k) binomial(4*n-k-1,n-k).