login
A072577
Numbers n such that n and the n-th prime have the same number of 0's in their binary representation.
4
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
a(n)=A049084(A072580(n)).
EXAMPLE
In binary representation 20 and A000040(20)=71 have three 0's: 13='10100' and 71='1000111', therefore 20 is a term.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 23 2002
STATUS
approved