A115666 - OEIS

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A115666

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

1

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

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

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