A127227 a(n)= numerator of ((n + 3)! - (n - 3)!)/(n!).

719, 5039, 20159, 60479, 151199, 332639, 665279, 1235519, 2162159, 3603599, 5765759, 8910719, 13366079, 19535039, 27907199, 39070079, 53721359, 72681839, 96909119, 127511999, 165765599, 213127199, 271252799, 342014399, 427517999

Offset: 3

Author

Artur Jasinski, Jan 09 2007

Keywords

• nonn
• frac

Crossrefs

Cf. A028387, A062938, A127228, A127229, A127230.

Programs

Mathematica

Table[Numerator[((n + 3)! - (n - 3)!)/(n!)], {n, 3, 30}]