A156819 Last digit d of a(n) is present in a(n+1+d); a(1)=0; a(n+1) is always the smallest available integer not already in the sequence and not leading to a contradiction.

0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 101, 1, 11, 12, 13, 2, 21, 3, 123, 4, 5, 23, 31, 6, 14, 32, 15, 7, 22, 24, 16, 25, 35, 8, 34, 17, 9, 56, 45, 41, 18, 19, 28, 27, 65, 26, 29, 33, 36, 38, 51, 3789, 61, 37, 71, 46, 91, 39, 81, 42, 102, 79

Offset

1,2

Comments

The sequence arising when a(n)<a(n+1) is A156818. Thanks to Hans Havermann and Paolo Lava for their remarks.

Links

Sean A. Irvine, Table of n, a(n) for n = 1..10000

Eric Angelini, LastDigit

E. Angelini, LastDigit [Cached copy, with permission]

Crossrefs

Sequence in context: A337857 A044895 A370400 * A139079 A360443 A209932

Adjacent sequences: A156816 A156817 A156818 * A156820 A156821 A156822

Keyword

base,easy,nonn

Author

Eric Angelini, Feb 16 2009

Extensions

More terms from Sean A. Irvine, Apr 09 2013

Status

approved