A385639 - cp's OEIS frontend

A385639 a(n) = Sum_{k=0..n} binomial(4n+1,k) binomial(2*n-k,n-k).

n	a(n)
0	1
1	7
2	69
3	748
4	8485
5	98847
6	1171884
7	14066808
8	170421669
9	2079531685
10	25520363869
11	314653207128
12	3894577133356
13	48362609654548
14	602248101550920
15	7517853111444528
16	94044248726758821
17	1178641094940246897
18	14796230460187072719
19	186022053254555479500
20	2341837809478393341885

[1, 7, 69, 748, 8485, 98847, 1171884, 14066808, 170421669, 2079531685, 25520363869, 314653207128, 3894577133356, 48362609654548, 602248101550920, 7517853111444528, 94044248726758821, 1178641094940246897, 14796230460187072719, 186022053254555479500, 2341837809478393341885]

cp's OEIS Frontend

A385639 a(n) = Sum_{k=0..n} binomial(4n+1,k) binomial(2*n-k,n-k).

Table of values

List of values

cp's OEIS Frontend

A385639 a(n) = Sum_{k=0..n} binomial(4*n+1,k) * binomial(2*n-k,n-k).

Table of values

List of values

A385639 a(n) = Sum_{k=0..n} binomial(4n+1,k) binomial(2*n-k,n-k).