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A163638
Two copies of the sequence A141468, one at prime the other at nonprime indices.
0
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, 27, 28, 15, 30, 16, 32, 33, 34, 35, 36, 18, 38, 39, 40, 20, 42, 21, 44, 45, 46, 22, 48, 49, 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
OFFSET
0,5
COMMENTS
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.
CROSSREFS
KEYWORD
nonn,less
AUTHOR
EXTENSIONS
Entries checked by R. J. Mathar, Aug 06 2009
STATUS
approved