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Octagonal numbers for which the product of the digits is also an octagonal number.
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%I #10 Jul 08 2024 08:39:17

%S 0,1,8,40,280,408,560,1045,1160,1408,1680,2640,3008,3201,3400,3605,

%T 4033,4720,5208,5720,7105,7400,7701,8008,8640,10325,10680,11041,11408,

%U 12160,14560,15408,16280,18096,19040,20008,20501,21000,21505,22016,23056

%N Octagonal numbers for which the product of the digits is also an octagonal number.

%e 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.

%Y Cf. A000567.

%K base,nonn

%O 0,3

%A Luc Stevens (lms022(AT)yahoo.com), Apr 17 2006