A239090 - OEIS

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A239090

The sequence S = a(1), a(2), ... is defined by a(1)=1, if d,e,f are consecutive digits then we do not have d >= e < f, and S is always extended with the smallest integer not yet present in S.

18

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 111, 1111, 11111, 111111, 1111111, 11111111, 111111111, 1111111111, 11111111111, 111111111111, 1111111111111, 11111111111111, 111111111111111, 1111111111111111, 11111111111111111, 111111111111111111

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Computed by Lars Blomberg.

REFERENCES

Eric Angelini, Posting to Sequence Fans Mailing List, Sep 28 2013

LINKS

Table of n, a(n) for n=1..26.

Eric Angelini, Less than <, Equal to =, Greater than > (see sequence Sp)

Eric Angelini, Less than <, Equal to =, Greater than > [Cached copy, with permission of the author]

CROSSREFS

The sequences in this family are given in A239083-A239086, A239136-A239139, A239087-A239090, A239215-A239218, A239235.

Sequence in context: A277856 A117057 A249516 * A248889 A029967 A029968

Adjacent sequences: A239087 A239088 A239089 * A239091 A239092 A239093

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Mar 11 2014

STATUS

approved