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 A255731 Rhonda numbers in sexagesimal number system. 14
 3348, 3510, 6750, 17430, 18750, 18876, 18944, 19475, 20564, 21312, 26550, 28280, 37230, 38396, 43940, 48042, 77770, 88270, 91224, 97470, 108882, 111403, 120046, 123630, 181996, 182646, 235467, 253460, 260429, 264735, 278675, 289161, 295960, 296055, 306642 (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 Wikipedia, Sexagesimal EXAMPLE a(1) = 3348 = 55 * 60^1 + 48 * 60^0 = 2*2*3*3*3*31, with 55 * 48 = 60 * (2+2+3+3+3+31) = 2640; a(10) = 21312 = 5*60^2 + 55*60^1 + 12*60^0 = 2*2*2*2*2*2*3*3*37, with 5 * 55 * 12 = 60 * (2+2+2+2+2+2+3+3+37) = 3300. PROG (Haskell) a255731 n = a255731_list !! (n-1) a255731_list = filter (rhonda 60) \$ iterate z 1 where    z x = 1 + if r < 59 then x else 60 * z x' where (x', r) = divMod x 60 -- 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), A255735 (base 18), A255732 (base 20), A255736 (base 30). Cf. A001414, A027746. Column k=42 of A291925. Sequence in context: A252188 A270338 A054356 * A204884 A204880 A151601 Adjacent sequences:  A255728 A255729 A255730 * A255732 A255733 A255734 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Mar 05 2015 STATUS approved

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Last modified August 20 10:03 EDT 2019. Contains 326143 sequences. (Running on oeis4.)