A162720 A014499 represented in binary.

1, 10, 10, 11, 11, 11, 10, 11, 100, 100, 101, 11, 11, 100, 101, 100, 101, 101, 11, 100, 11, 101, 100, 100, 11, 100, 101, 101, 101, 100, 111, 11, 11, 100, 100, 101, 101, 100, 101, 101, 101, 101, 111, 11, 100, 101, 101, 111, 101, 101, 101, 111, 101, 111, 10

Offset: 1

Author

Ben Branman, Jul 11 2009

Keywords

• base
• nonn

Examples

			The 5th prime number is 11. The binary representation of 11 is 1011. There are 3 "1s" in 1011. 3 in binary is 11, so a(5)=3.
		

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A007088, A014499.

Programs

PARI

a(n)={fromdigits(digits(hammingweight(prime(n)), 2))} \\ Andrew Howroyd, Nov 08 2019

Formula

a(n) = A007088(A014499(n)). - Andrew Howroyd, Nov 08 2019

Extensions

Terms a(32) and beyond from Andrew Howroyd, Nov 08 2019