A115666 Semiprimes (A001358) whose digit reversal is a brilliant number (A078972).

4, 6, 9, 51, 94, 121, 122, 143, 155, 158, 169, 178, 187, 319, 323, 329, 335, 341, 394, 398, 718, 734, 737, 766, 767, 781, 913, 926, 949, 955, 961, 979, 982, 985, 989, 998, 1141, 1202, 1211, 1273, 1322, 1343, 1405, 1415, 1655, 1691, 1703, 1714, 1807

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Example

155=5*31 is semiprime and 551=19*29 is brilliant.

Crossrefs

Cf. A001358, A078972, A115665.

Sequence in context: A107342 A086698 A317248 * A245044 A104389 A115655

Adjacent sequences: A115663 A115664 A115665 * A115667 A115668 A115669

Keyword

nonn,base

Author

Giovanni Resta, Jan 31 2006

Status

approved