A115670 Semiprimes (A001358) whose digit reversal is prime.

14, 34, 35, 38, 74, 91, 95, 106, 118, 119, 133, 134, 142, 145, 146, 166, 194, 301, 305, 334, 346, 358, 361, 362, 365, 371, 377, 382, 386, 391, 395, 703, 706, 713, 721, 731, 745, 746, 749, 755, 758, 763, 778, 779, 785, 791, 793, 799, 901, 905, 914, 917, 922

Offset

1,1

Links

Table of n, a(n) for n=1..53.

Example

35=5*7 is semiprime and 53 is prime.

Crossrefs

Cf. A001358, A083815, A085778, A097393.

Sequence in context: A007365 A065933 A276715 * A182180 A112878 A175559

Adjacent sequences: A115667 A115668 A115669 * A115671 A115672 A115673

Keyword

nonn,base

Author

Giovanni Resta, Jan 31 2006

Status

approved