A036961 Primes with digits (0,...,6) taken as base 7 and converted to base 10.

2, 3, 5, 8, 10, 17, 22, 29, 31, 38, 43, 50, 52, 59, 71, 85, 94, 106, 115, 122, 127, 134, 143, 155, 157, 169, 185, 197, 211, 218, 220, 227, 239, 241, 248, 260, 262, 274, 290, 295, 304, 316, 323, 325, 332, 337, 353, 358, 365, 367, 379, 386, 388, 395, 409, 428

Offset: 1

Author

Patrick De Geest, Jan 04 1999

Keywords

• nonn
• base

Examples

			a(n)=323 -> is 641{7} -> 641{10} is prime.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A036952-A036964.

Programs

Mathematica

pd7[n_]:=With[{c=IntegerDigits[n]},If[Max[c]<7,FromDigits[c,7],Nothing]]; pd7/@Prime[Range[300]] (* Harvey P. Dale, Mar 14 2025 *)