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A085556 Number of prime digits = number of nonprime digits. 0
12, 13, 15, 17, 20, 21, 24, 26, 28, 29, 30, 31, 34, 36, 38, 39, 42, 43, 45, 47, 50, 51, 54, 56, 58, 59, 62, 63, 65, 67, 70, 71, 74, 76, 78, 79, 82, 83, 85, 87, 92, 93, 95, 97, 1022, 1023, 1025, 1027, 1032, 1033, 1035, 1037, 1052, 1053, 1055, 1057, 1072, 1073, 1075 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..59.

MATHEMATICA

Select[Range[1200], Count[IntegerDigits[#], _?PrimeQ]== IntegerLength[#]/2&] (* Harvey P. Dale, Jun 02 2011 *)

CROSSREFS

Cf. A085520.

Sequence in context: A074163 A076979 A085520 * A175225 A187234 A127354

Adjacent sequences:  A085553 A085554 A085555 * A085557 A085558 A085559

KEYWORD

base,easy,nonn

AUTHOR

Jason Earls, Jul 04 2003

STATUS

approved

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Last modified September 20 05:34 EDT 2021. Contains 347577 sequences. (Running on oeis4.)