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!)
A262412 A262411 in ternary representation. 2
1, 10, 11, 12, 2, 20, 22, 21, 100, 101, 102, 110, 111, 112, 120, 121, 122, 200, 202, 201, 212, 210, 221, 211, 222, 220, 1002, 1001, 1000, 1010, 1011, 1012, 1021, 1020, 1101, 1022, 1102, 1110, 1100, 1111, 1112, 1120, 1121, 1122, 1201, 1200, 1211, 1202, 1212 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A007089(A262411(n)).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

EXAMPLE

See A262411.

PROG

(Haskell)

import Data.List (inits, tails, intersect, delete)

a262412 n = a262412_list !! (n - 1)

a262412_list = 1 : f [1] (drop 2 a030341_tabf) where

   f xs tss = g tss where

     g (ys:yss) | null (intersect its $ tail $ inits ys) &&

                  null (intersect tis $ init $ tails ys) = g yss

                | otherwise = (foldr (\t v -> 10 * v + t) 0 ys) :

                              f ys (delete ys tss)

     its = init $ tails xs; tis = tail $ inits xs

-- Reinhard Zumkeller, Sep 22 2015

CROSSREFS

Cf. A030341, A007089, A262411.

Sequence in context: A162501 A286890 A262323 * A333722 A299981 A123895

Adjacent sequences:  A262409 A262410 A262411 * A262413 A262414 A262415

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Sep 22 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 June 4 04:39 EDT 2020. Contains 334815 sequences. (Running on oeis4.)