A161844 Product of the n-th composite by the n-th nonprime.

0, 6, 32, 54, 80, 108, 140, 180, 224, 270, 320, 378, 440, 504, 550, 624, 675, 728, 810, 896, 990, 1088, 1155, 1224, 1330, 1404, 1520, 1638, 1760, 1890, 2024, 2160, 2254, 2400, 2499, 2600, 2754, 2860, 3024, 3135, 3248, 3420, 3596, 3780, 3968, 4095, 4224, 4420

Offset

1,2

Links

Table of n, a(n) for n=1..48.

Formula

a(n) = A002808(n)*A141468(n).

Example

4*0=0. 6*1=6. 8*4=32. 9*6=54. 10*8=80.

Crossrefs

Cf. A002808, A141468.

Sequence in context: A126976 A045159 A121002 * A305291 A177082 A296196

Adjacent sequences: A161841 A161842 A161843 * A161845 A161846 A161847

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jun 20 2009

Extensions

106 replaced by 108, R. J. Mathar, Aug 27 2009

Status

approved