A347989 - cp's OEIS frontend

A347989 a(n) = [x^n] (2n)! Sum_{k=0..2*n} binomial(x+k,k).

n	a(n)
0	1
1	5
2	71
3	1665
4	54649
5	2310945
6	119753843
7	7353403057
8	522289211873
9	42137920501677
10	3807384320667135
11	380929847762489025
12	41811136672902061321
13	4995760464106519955705
14	645541681316043216096315
15	89705032647088734873129825
16	13340173206548155385625683265
17	2114001534402053456524492822485

[1, 5, 71, 1665, 54649, 2310945, 119753843, 7353403057, 522289211873, 42137920501677, 3807384320667135, 380929847762489025, 41811136672902061321, 4995760464106519955705, 645541681316043216096315, 89705032647088734873129825, 13340173206548155385625683265, 2114001534402053456524492822485]

cp's OEIS Frontend

A347989 a(n) = [x^n] (2n)! Sum_{k=0..2*n} binomial(x+k,k).

Table of values

List of values

cp's OEIS Frontend

A347989 a(n) = [x^n] (2*n)! * Sum_{k=0..2*n} binomial(x+k,k).

Table of values

List of values

A347989 a(n) = [x^n] (2n)! Sum_{k=0..2*n} binomial(x+k,k).