A092472 - cp's OEIS frontend

A092472 a(n)=sum(i+j+k=n,(2n)!/(i+j)!/(j+k)!/(k+i)!) 0<=i<=n, 0<=j<=n, 0<=k<=n.

n	a(n)
0	1
1	6
2	54
3	510
4	4830
5	45486
6	425502
7	3956238
8	36594558
9	337038702
10	3093092574
11	28302208974
12	258331692606
13	2353101799470
14	21397006320030
15	194281959853710
16	1761880227283710
17	15961196057303790
18	144466419007648350

[1, 6, 54, 510, 4830, 45486, 425502, 3956238, 36594558, 337038702, 3093092574, 28302208974, 258331692606, 2353101799470, 21397006320030, 194281959853710, 1761880227283710, 15961196057303790, 144466419007648350]

cp's OEIS Frontend

A092472 a(n)=sum(i+j+k=n,(2n)!/(i+j)!/(j+k)!/(k+i)!) 0<=i<=n, 0<=j<=n, 0<=k<=n.

Table of values

List of values