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A117682
Prime numbers for which the product of the digits is a triangular number.
2
3, 11, 13, 23, 31, 37, 47, 53, 59, 61, 73, 101, 103, 107, 109, 113, 131, 137, 149, 173, 227, 229, 251, 263, 307, 311, 317, 353, 401, 409, 419, 433, 491, 503, 509, 521, 601, 607, 661, 701, 709, 769, 809, 853, 907, 941, 967, 1009, 1013, 1019, 1021, 1031, 1033
OFFSET
1,1
EXAMPLE
59 is in the sequence because (1) it is a prime number and (2) the product of its digits 5*9=45 is a triangular number.
CROSSREFS
Cf. A000217.
Sequence in context: A116438 A191078 A281816 * A045429 A168164 A296933
KEYWORD
nonn,base
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), Apr 27 2006
STATUS
approved