login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A255736 Integers that are Rhonda numbers to base 30. 15
3024, 3168, 5115, 5346, 5950, 6762, 7750, 7956, 8470, 9476, 9576, 9849, 10360, 11495, 13035, 13356, 16335, 22610, 22784, 23864, 37515, 38025, 40704, 40986, 49887, 52925, 59800, 60955, 61812, 67782, 68590, 74800, 78430, 85063, 90160, 90649, 90897, 91540 (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) = 3024 = 3 * 30^2 + 10 * 30^1 + 24 * 30^0 = 2*2*2*2*3*3*3*7,

with 3 * 10 * 24 = 30 * (2+2+2+2+3+3+3+7) = 720;

a(10) = 9476 = 10 * 30^2 + 15 * 30^1 + 26 * 30^0 = 2*2*23*103,

with 10 * 15 * 26 = 30 * (2+2+23+103) = 3900.

PROG

(Haskell)

a255736 n = a255736_list !! (n-1)

a255736_list = filter (rhonda 30) $ iterate z 1 where

   z x = 1 + if r < 29 then x else 30 * z x' where (x', r) = divMod x 30

-- 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), A255731 (base 60), see also A255872.

Cf. A001414, A027746.

Column k=19 of A291925.

Sequence in context: A236200 A252620 A104960 * A231762 A034600 A225996

Adjacent sequences:  A255733 A255734 A255735 * A255737 A255738 A255739

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Mar 05 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 25 22:37 EST 2021. Contains 341618 sequences. (Running on oeis4.)