2178 And All That

Article by Sloane, NJA

In collections: Easily explained, Integerology

For integers g >= 3, k >= 2, call a number N a (g,k)-reverse multiple if the reversal of N in base g is equal to k times N. The numbers 1089 and 2178 are the two smallest (10,k)-reverse multiples, their reversals being 9801 = 9x1089 and 8712 = 4x2178. In 1992, A. L....

URL: http://arxiv.org/abs/1307.0453

PDF: http://arxiv.org/pdf/1307.0453v4

Entry: http://read.somethingorotherwhatever.com/entry/Sloane2013