login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A129562 Slowest increasing sequence that starts with 1 and has property that adding two consecutive terms gives a number which does not share a digit with either of the two terms. 1
1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 17, 18, 19, 21, 22, 23, 25, 35, 36, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 51, 149, 151, 152, 154, 155, 165, 167, 168, 169, 171, 172, 176, 177, 178, 181, 182, 184, 185, 188, 189, 211, 219, 221, 222, 223, 225, 235, 236, 238 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Terms shown above computed by Lapinot.

LINKS

Andrew Woods, Table of n, a(n) for n = 1..10000

PROG

(Sage)

@cached_function

def A129562(n):

....if n == 1: return 1

....nocommon = lambda x, y: not set(x.digits()).intersection(y.digits())

....last = A129562(n-1)

....return next(k for k in IntegerRange(last+1, infinity) if nocommon(k, last+k) and nocommon(last, last+k))

....# [D. S. McNeil, Aug 31 2011]

CROSSREFS

Sequence in context: A038365 A247761 A031185 * A191841 A050741 A133810

Adjacent sequences:  A129559 A129560 A129561 * A129563 A129564 A129565

KEYWORD

base,easy,nonn

AUTHOR

Eric Angelini, May 30 2007

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified March 24 22:02 EDT 2017. Contains 284025 sequences.