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A102494 Numbers in base-60 representation that cannot be written with decimal digits. 5
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Mohammad K. Azarian, Meftah al-hesab: A Summary, MJMS, Vol. 12, No. 2, Spring 2000, pp. 75-95. Mathematical Reviews, MR 1 764 526. Zentralblatt MATH, Zbl 1036.01002.

Mohammad K. Azarian, A Summary of Mathematical Works of Ghiyath ud-din Jamshid Kashani, Journal of Recreational Mathematics, Vol. 29(1), pp. 32-42, 1998.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Eric Weisstein's World of Mathematics, Sexagesimal

Wikipedia, Sexagesimal

EXAMPLE

200 = 3*60^1 + 20*60^0 = '3K', therefore 200 is a term.

MATHEMATICA

Select[Range[100], Max[IntegerDigits[#, 60]]>9&] (* Harvey P. Dale, Dec 27 2012 *)

PROG

(Haskell)

import Data.List (unfoldr)

a102494 n = a102494_list !! (n-1)

a102494_list = filter (any (> 9) . unfoldr

   (\x -> if x == 0 then Nothing else Just $ swap $ divMod x 60)) [0..]

-- Reinhard Zumkeller, Jun 27 2013

CROSSREFS

Complement of A102493; A102488, A102490, A102492.

Sequence in context: A328075 A001637 A308407 * A117884 A133506 A174140

Adjacent sequences:  A102491 A102492 A102493 * A102495 A102496 A102497

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jan 12 2005

STATUS

approved

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Last modified July 5 20:10 EDT 2020. Contains 335473 sequences. (Running on oeis4.)