A117826 First four terms of the sequence are doubled, then those numbers are tripled and then those numbers are quadrupled, etc.

1, 2, 3, 4, 2, 4, 6, 8, 6, 12, 18, 24, 24, 48, 72, 96, 120, 240, 360, 480, 720, 1440, 2160, 2880, 5040, 10080, 15120, 20160, 40320, 80640, 120960, 161280, 362880, 725760, 1088640, 1451520, 3628800, 7257600, 10886400, 14515200, 39916800, 79833600

Offset: 1

Author

Robert G. Wilson v, Apr 25 2006

Keywords

• nonn

Crossrefs

Cf. A000142, A115425.

Programs

Mathematica

Table[n!{1, 2, 3, 4}, {n, 11}] // Flatten

Formula

a(4n-3) = A000142(n). a(4n-2)=2*A000142(n)=A052849(n), a(4n-1)=3*A000142(n)=A052560(n), a(4n)=4*A000142(n)=2*A052849(n)=A052578(n).