A115670 - OEIS

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A115670

Semiprimes (A001358) whose digit reversal is prime.

3

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

(list; graph; refs; listen; history; text; internal format)

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