S000898


Numbers not a multiple of 10 whose reciprocals have a palindromic repeating part.

3, 9, 15, 18, 45, 225, 1125

1

S000898

It appears that this sequence is complete.

T. D. Noe, Plot of 7 terms

Wikipedia, Repeating decimal

(Mma) Select[Range[1200], (r = RealDigits[1/#, 10]; Mod[#, 10] > 0 && ! IntegerQ[r[[1,1]]] && r[[1,1]] == Reverse[r[[1,1]]]) &]

Cf. S000897-S000903.

nonn,base,nice

T. D. Noe, Jun 01 2016

© Tony D Noe 2014-2016