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A117083
Octagonal numbers for which the product of the digits is also an octagonal number.
0
0, 1, 8, 40, 280, 408, 560, 1045, 1160, 1408, 1680, 2640, 3008, 3201, 3400, 3605, 4033, 4720, 5208, 5720, 7105, 7400, 7701, 8008, 8640, 10325, 10680, 11041, 11408, 12160, 14560, 15408, 16280, 18096, 19040, 20008, 20501, 21000, 21505, 22016, 23056
OFFSET
0,3
EXAMPLE
27456 is in the sequence because (1) it is an octagonal number and (2) the product of its digits 2*7*4*5*6 = 1680 is also an octagonal number.
CROSSREFS
Cf. A000567.
Sequence in context: A264332 A188332 A158922 * A007987 A343868 A350125
KEYWORD
base,nonn
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), Apr 17 2006
STATUS
approved