A173074 Numbers k such that A171715(k)=2*A173073(k).

5, 6, 12, 21, 40, 41, 74, 76, 100, 136, 157, 161, 403, 728, 729, 738, 743, 1476

Offset: 1

Author

Juri-Stepan Gerasimov, Feb 09 2010

Keywords

• nonn
• changed

Comments

Numbers k such that A171715(k)=2*A173073(k). Or, numbers k such that A007645(k)-A003627(k)=2*(A141468(k)-A001477(k)) where A007645 U A003627 U A141468 = A000040 U A141468 = A001477.

No further terms between 1476 and 80000. [From R. J. Mathar, May 02 2010]

Examples

			a(1)=5 because 8=2*4.
		

Crossrefs

Cf. A000040(the primes), A001477(the nonnegative numbers), A003627(the generalized non-cuban primes), A007645(the generalized cuban primes), A141468 (the nonnegative nonprimes), A171715 (the differences between generalized cuban and non-cuban primes), A173073 (the differences between nonnegative nonprimes and nonnegative numbers).

Formula

A171715(a(n))=2*A173073(a(n)).

Extensions

Terms from 100 up to 1476 from R. J. Mathar, May 02 2010