A378613 - cp's OEIS frontend

A378613 a(n) = Sum_{k=0..n} binomial(4n+k-1,k) binomial(n-1,n-k).

n	a(n)
0	1
1	4
2	44
3	532
4	6748
5	88024
6	1169444
7	15738328
8	213842716
9	2927097712
10	40302226944
11	557565134196
12	7744326799684
13	107925260553088
14	1508352084699224
15	21132667178858512
16	296716493251706652
17	4174006026061733232
18	58816013334014598032
19	830025065117154066064
20	11729345524163083673648

[1, 4, 44, 532, 6748, 88024, 1169444, 15738328, 213842716, 2927097712, 40302226944, 557565134196, 7744326799684, 107925260553088, 1508352084699224, 21132667178858512, 296716493251706652, 4174006026061733232, 58816013334014598032, 830025065117154066064, 11729345524163083673648]

cp's OEIS Frontend

A378613 a(n) = Sum_{k=0..n} binomial(4n+k-1,k) binomial(n-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A378613 a(n) = Sum_{k=0..n} binomial(4*n+k-1,k) * binomial(n-1,n-k).

Table of values

List of values

A378613 a(n) = Sum_{k=0..n} binomial(4n+k-1,k) binomial(n-1,n-k).