A072577 Numbers n such that n and the n-th prime have the same number of 0's in their binary representation.

5, 6, 20, 22, 24, 28, 31, 32, 34, 37, 41, 42, 49, 50, 67, 68, 81, 82, 84, 88, 89, 93, 94, 138, 139, 140, 141, 142, 143, 147, 151, 157, 165, 192, 194, 198, 200, 202, 206, 207, 232, 236, 241, 262, 265, 270, 271, 284, 285, 295, 301, 328, 329, 332, 333, 337

Offset

1,1

Comments

A023416(a(n))=A023416(A072580(n))=A035103(n);

a(n)=A049084(A072580(n)).

Links

Table of n, a(n) for n=1..56.

Example

In binary representation 20 and A000040(20)=71 have three 0's: 13='10100' and 71='1000111', therefore 20 is a term.

Crossrefs

Cf. A071600, A072578, A072579.

Sequence in context: A129722 A133608 A317444 * A231182 A231181 A259775

Adjacent sequences: A072574 A072575 A072576 * A072578 A072579 A072580

Keyword

nonn

Author

Reinhard Zumkeller, Jun 23 2002

Status

approved