A036978 Numbers for which the "describe what you see" transform A045918 produces a prime.

1, 3, 7, 9, 17, 23, 27, 33, 39, 51, 63, 69, 81, 93, 99, 111, 113, 121, 127, 133, 137, 161, 193, 199, 203, 209, 223, 233, 271, 299, 301, 311, 313, 323, 331, 343, 359, 361, 367, 371, 373, 377, 431, 433, 439, 441, 447, 451, 463, 469, 477, 479, 481, 497

Offset: 1

Author

G. L. Honaker, Jr.

Keywords

• nonn
• base
• easy

Examples

			E.g. 33 -> "Two threes" -> 23, which is prime.
		

Crossrefs

Cf. A036979, A045918.

Programs

PARI

for(n=1,999,isprime(A045918(n)) & print1(n","))  \\ M. F. Hasler, Jan 27 2012

Extensions

Corrected by inserting the missing a(19)=127 by M. F. Hasler, Jan 27 2012