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%I #2 Mar 30 2012 17:40:33
%S 1,15,6615,19360877637633638400
%N n is the product of T(d_i) where d_i are the nonzero digits of n and T(k) denotes the k-th triangular number.
%e 6615 = T(6)*T(6)*T(1)*T(5)=21*21*1*15.
%K base,nonn
%O 1,2
%A _Giovanni Resta_, Jan 21 2006
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