A178796 -id:A178796 - cp's OEIS frontend

A179284 A178796(n) in binary system.

10, 1011, 1101, 10001, 11111, 110101, 1000111, 1001111, 1100001, 1100101, 1100111, 1101011, 11010011, 11101001, 11111011, 100010101, 101011101, 101101111, 110101111, 110110111, 111001001, 111110111, 1000001001

Offset: 1

Giovanni Teofilatto, Jul 09 2010

The intersection with A020449 yields 1100101, 101101111, 111001001, 1011000101, 10111001011, 11001000001, 11011011001 etc. [R. J. Mathar, Jul 12 2010]

a(n) = A007088(A178796(n)). [R. J. Mathar, Jul 12 2010]

Corrected and extended by Vincenzo Librandi and R. J. Mathar, Jul 12 2010

A068807 Primes whose sum of digits is a power of 2.

Original entry on oeis.org

2, 11, 13, 17, 31, 53, 71, 79, 97, 101, 103, 107, 211, 233, 251, 277, 349, 367, 431, 439, 457, 503, 521, 547, 619, 673, 691, 701, 709, 727, 853, 907, 1021, 1061, 1069, 1087, 1151, 1201, 1223, 1249, 1429, 1447, 1483, 1511, 1601, 1609, 1627, 1663, 1753, 1861, 1933, 1951, 2011, 2141

Offset: 1

Amarnath Murthy, Mar 06 2002

Subsequence of primes of A028838. - Michel Marcus, Aug 19 2015

Aaron Toponce, Table of n, a(n) for n = 1..10000

Different from A178796.

[p: p in PrimesUpTo(2200) | PrimeDivisors(s) eq [2] where s is &+Intseq(p)]; // Bruno Berselli, Dec 26 2012

Select[ Prime@Range[ 300 ],IntegerQ[ Log[ 2,Plus@@IntegerDigits[ # ] ] ]& ] (* Ray Chandler, Dec 03 2009 *)

lista(nn) = forprime (n=1, nn, sd = sumdigits(n); if (2^valuation(sd,2) == sd, print1(n, ", "))); \\ Michel Marcus, Aug 19 2015

Extended by Ray Chandler, Dec 03 2009

cp's OEIS Frontend

A179284 A178796(n) in binary system.

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A068807 Primes whose sum of digits is a power of 2.

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