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A031344 Write primes in base 10 but interpret as if in base 12. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

FORMULA

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

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

CROSSREFS

Sequence in context: A228891 A168484 A217907 * A004682 A173105 A024783

Adjacent sequences:  A031341 A031342 A031343 * A031345 A031346 A031347

KEYWORD

nonn,base

AUTHOR

Jeff Burch

STATUS

approved

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Last modified November 19 19:09 EST 2019. Contains 329323 sequences. (Running on oeis4.)