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Two copies of the sequence A141468, one at prime the other at nonprime indices.
0

%I #7 Mar 19 2018 04:07:22

%S 0,1,0,1,4,4,6,6,8,9,10,8,12,9,14,15,16,10,18,12,20,21,22,14,24,25,26,

%T 27,28,15,30,16,32,33,34,35,36,18,38,39,40,20,42,21,44,45,46,22,48,49,

%U 50,51,52,24,54,55,56,57,58,25,60,26,62,63,64,65,66,27,68,69,70,28,72,30,74,75

%N Two copies of the sequence A141468, one at prime the other at nonprime indices.

%C The indices of this sequence are labeled as 0=N, 1=N, 2=P, 3=P, 4=N, 5=P, 6=N, etc. N=nonprime or P=prime. The numbers 0,1,4,6,8, etc. of A141468 are filled in once at consecutive positions marked N, and a second time at the positions marked P.

%Y Cf. A000040, A001477, A141468.

%K nonn,less

%O 0,5

%A _Juri-Stepan Gerasimov_, Aug 02 2009

%E Entries checked by _R. J. Mathar_, Aug 06 2009