login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A290387 Increasing sequence where a(n) is the smallest integer not yet in the sequence with no digits shared with the term a(n-2), no repeated digits, and no 0-digit allowed. 1

%I

%S 1,2,3,4,5,6,7,8,9,12,13,34,42,51,53,62,64,71,72,82,83,91,92,234,314,

%T 516,526,723,731,814,824,923,931,1456,2456,2738,3178,4156,4256,7238,

%U 7318,9145,9245,23678,31678

%N Increasing sequence where a(n) is the smallest integer not yet in the sequence with no digits shared with the term a(n-2), no repeated digits, and no 0-digit allowed.

%e a(35)=2456 is followed by a(36)=2738 (and not 2378, which contains digits different from those in a(34)=1456) since otherwise the sequence would not be increasing.

%Y Cf. A290386.

%K nonn,base,fini,full

%O 1,2

%A _Enrique Navarrete_, Jul 28 2017

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 January 28 04:30 EST 2022. Contains 350654 sequences. (Running on oeis4.)