A094199 - cp's OEIS frontend

A094199 a(0) = -1/2; for n > 0, a(n) = 2(5n-4)(5n-6)a(n-1) + Sum_{k=1..n-1} a(k)a(n-k).

n	a(n)
1	1
2	49
3	9800
4	4412401
5	3530881200
6	4414129955298
7	7945866428953600
8	19467894010226044005
9	62298157203907977632000
10	252309651689367225339613486
11	1261554846529199611110022246400
12	7632433016288078444696820350362442
13	54953647052313016042619300361129676800

[1, 49, 9800, 4412401, 3530881200, 4414129955298, 7945866428953600, 19467894010226044005, 62298157203907977632000, 252309651689367225339613486, 1261554846529199611110022246400, 7632433016288078444696820350362442, 54953647052313016042619300361129676800]

cp's OEIS Frontend

A094199 a(0) = -1/2; for n > 0, a(n) = 2(5n-4)(5n-6)a(n-1) + Sum_{k=1..n-1} a(k)a(n-k).

Table of values

List of values

cp's OEIS Frontend

A094199 a(0) = -1/2; for n > 0, a(n) = 2*(5*n-4)*(5*n-6)*a(n-1) + Sum_{k=1..n-1} a(k)*a(n-k).

Table of values

List of values

A094199 a(0) = -1/2; for n > 0, a(n) = 2(5n-4)(5n-6)a(n-1) + Sum_{k=1..n-1} a(k)a(n-k).