1,2

Table of n, a(n) for n=1..7.

For n=30240, n^2 = 914,457,600; the product of the nonzero digits of this square, 9*1*4*4*5*7*6 = 30240 = n.

Special case of A218013 where the ratio of the digit-product to the original number is 1. Related to A218072.

Sequence in context: A113286 A027687 A190475 * A323991 A109485 A156429

Adjacent sequences: A218026 A218027 A218028 * A218030 A218031 A218032

nonn,base

Nels Olson, Oct 18 2012

approved