A077534 Multiples of 4 using only prime digits (2, 3, 5 and 7).

32, 52, 72, 232, 252, 272, 332, 352, 372, 532, 552, 572, 732, 752, 772, 2232, 2252, 2272, 2332, 2352, 2372, 2532, 2552, 2572, 2732, 2752, 2772, 3232, 3252, 3272, 3332, 3352, 3372, 3532, 3552, 3572, 3732, 3752, 3772, 5232, 5252, 5272, 5332, 5352, 5372

Offset: 1

Author

Amarnath Murthy, Nov 08 2002

Keywords

• base
• nonn

Comments

Last digit is 2, next-to-last digit is odd, each remaining digit can be any prime digit.

Crossrefs

Cf. A077533.

Programs

Mathematica

Select[4Range[2000],And@@PrimeQ[IntegerDigits[#]]&] (* Harvey P. Dale, Dec 13 2010 *)

Extensions

Corrected and extended by Sascha Kurz, Jan 03 2003