210526315789473684 appears twice in the OEIS, but only once in a relevant entry: %I A094676 %S A094676 210526315789473684,3103448275862068965517241379,410256, %T A094676 510204081632653061224489795918367346938775, %U A094676 6101694915254237288135593220338983050847457627118644067796,7101449275362318840579,8101265822784,91011235955056179775280898876404494382022471 %N A094676 Least n-transposable number. %C A094676 A k-transposable number,2<=k<=9, is one equal to k times the number whose digits are merely a cyclic permutation of its own leftmost digit to the right. %D A094676 H. Camous, Jouer Avec Les Maths, "Chassez le naturel", Section I, Problem 3 pp. 20;31-2, Les Editions D'Organisation, Paris 1984. %D A094676 L. A. Graham, Ingenious Mathematical Problems and Methods, "End At The Beginning", Problem 72 pp. 44;212-3 Dover NY 1959. %F A094676 n prepended to n*(10^m - n)/(10*n - 1), where m=A094224(n)-1. %e A094676 a(4)=410256=4*102564 %K A094676 fini,nonn %O A094676 2,1 %A A094676 Lekraj Beedassy (blekraj(AT)yahoo.com), Jun 07 2004 - though the definition doesn't look right! I will edit it. Anyway, could someone send me more terms of the sequence 210526315789473684, ... of numbers with the Freeman Dyson doubling property? Neil