A123900 - cp's OEIS frontend

A123900 a(n) = (n+3)!/(d(n)d(n+1)d(n+2)) where d(n) = cancellation factor in reducing Sum_{k=0...n} 1/k! to lowest terms.

n	a(n)
0	6
1	12
2	60
3	180
4	2520
5	1008
6	18144
7	18144
8	3991680
9	5987520
10	155675520
11	1089728640
12	26153487360
13	523069747200
14	17784371404800
15	12312257126400
16	935731541606400
17	4678657708032
18	12772735542927360
19	140500090972200960

[6, 12, 60, 180, 2520, 1008, 18144, 18144, 3991680, 5987520, 155675520, 1089728640, 26153487360, 523069747200, 17784371404800, 12312257126400, 935731541606400, 4678657708032, 12772735542927360, 140500090972200960]

cp's OEIS Frontend

A123900 a(n) = (n+3)!/(d(n)d(n+1)d(n+2)) where d(n) = cancellation factor in reducing Sum_{k=0...n} 1/k! to lowest terms.

Table of values

List of values

cp's OEIS Frontend

A123900 a(n) = (n+3)!/(d(n)*d(n+1)*d(n+2)) where d(n) = cancellation factor in reducing Sum_{k=0...n} 1/k! to lowest terms.

Table of values

List of values

A123900 a(n) = (n+3)!/(d(n)d(n+1)d(n+2)) where d(n) = cancellation factor in reducing Sum_{k=0...n} 1/k! to lowest terms.