A385514 - cp's OEIS frontend

A385514 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(2n+1,k) binomial(2*n-k,n-k).

n	a(n)
0	1
1	7
2	64
3	643
4	6766
5	73162
6	805414
7	8979523
8	101060326
9	1145704162
10	13064219224
11	149674343518
12	1721537039236
13	19866626222632
14	229912254620434
15	2667252458378083
16	31009548579437446
17	361198085246048602
18	4214267651960927824
19	49243413868632029338
20	576179701092650156356

[1, 7, 64, 643, 6766, 73162, 805414, 8979523, 101060326, 1145704162, 13064219224, 149674343518, 1721537039236, 19866626222632, 229912254620434, 2667252458378083, 31009548579437446, 361198085246048602, 4214267651960927824, 49243413868632029338, 576179701092650156356]

cp's OEIS Frontend

A385514 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(2n+1,k) binomial(2*n-k,n-k).

Table of values

List of values

cp's OEIS Frontend

A385514 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(2*n+1,k) * binomial(2*n-k,n-k).

Table of values

List of values

A385514 a(n) = Sum_{k=0..n} 2^(n-k) * binomial(2n+1,k) binomial(2*n-k,n-k).