A031344 Write primes in base 10 but interpret as if in base 12.

2, 3, 5, 7, 13, 15, 19, 21, 27, 33, 37, 43, 49, 51, 55, 63, 69, 73, 79, 85, 87, 93, 99, 105, 115, 145, 147, 151, 153, 159, 175, 181, 187, 189, 201, 205, 211, 219, 223, 231, 237, 241, 253, 255, 259, 261, 301, 315, 319, 321, 327, 333, 337, 349, 355

Offset: 1

Author

Jeff Burch

Keywords

• nonn
• base

Programs

Maple

A102487 := proc(n) local dgs; dgs := convert(n,base,10) ; add(op(d,dgs)*12^(d-1), d=1..nops(dgs)) ; end proc:
A031344 := proc(n) A102487(ithprime(n)) ; end proc: # R. J. Mathar, Apr 09 2011

Formula

a(n) = A102487(A000040(n)). - R. J. Mathar, Apr 09 2011