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Product of the n-th composite by the n-th nonprime.
0

%I #6 Jun 14 2016 04:20:32

%S 0,6,32,54,80,108,140,180,224,270,320,378,440,504,550,624,675,728,810,

%T 896,990,1088,1155,1224,1330,1404,1520,1638,1760,1890,2024,2160,2254,

%U 2400,2499,2600,2754,2860,3024,3135,3248,3420,3596,3780,3968,4095,4224,4420

%N Product of the n-th composite by the n-th nonprime.

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

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

%Y Cf. A002808, A141468.

%K nonn

%O 1,2

%A _Juri-Stepan Gerasimov_, Jun 20 2009

%E 106 replaced by 108, _R. J. Mathar_, Aug 27 2009