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 A255735 Integers that are Rhonda numbers to base 18. 15
 1470, 3000, 8918, 17025, 19402, 20650, 21120, 22156, 26522, 36549, 38354, 43281, 46035, 48768, 54229, 54528, 56584, 58216, 58224, 62238, 68096, 68150, 73161, 74024, 74636, 87978, 94041, 114000, 124656, 132240, 133926, 135876, 153105, 153870, 156621, 159819 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A099542 for definition of Rhonda numbers and for more links. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 Eric Weisstein's World of Mathematics, Rhonda Number EXAMPLE a(1) = 1470 = 4*18^2 + 9*18^1 + 12*18^0 = 2*3*5*7*7, with 4 * 9 * 12 = 18 * (2+3+5+7+7) = 432; a(10) = 36549 = 6*18^3 + 4*18^2 + 14*18^1 + 9*18^0 = 3*3*31*131, with 6 * 4 * 14 * 9 = 18 * (3+3+31+131) = 3024. PROG (Haskell) a255735 n = a255735_list !! (n-1) a255735_list = filter (rhonda 18) \$ iterate z 1 where z x = 1 + if r < 17 then x else 18 * z x' where (x', r) = divMod x 18 -- Function rhonda as in A099542. CROSSREFS Cf. Rhonda numbers to other bases: A100968 (base 4), A100969 (base 6), A100970 (base 8), A100973 (base 9), A099542 (base 10), A100971 (base 12), A100972 (base 14), A100974 (base 15), A100975 (base 16), A255732 (base 20), A255736 (base 30), A255731 (base 60), A255872. Cf. A001414, A027746. Column k=10 of A291925. Sequence in context: A252578 A083526 A068753 * A252521 A237379 A237144 Adjacent sequences: A255732 A255733 A255734 * A255736 A255737 A255738 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Mar 05 2015 STATUS approved

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Last modified April 21 13:20 EDT 2024. Contains 371870 sequences. (Running on oeis4.)