A156818 Last digit d of a(n) is present in a(n+1+d); a(1)=1; a(n)<a(n+1)

1, 2, 10, 20, 102, 103, 104, 112, 113, 123, 124, 134, 135, 136, 137, 140, 204, 205, 215, 216, 226, 234, 237, 245, 250, 260, 406, 416, 417, 425, 427, 428, 429, 436, 446, 450, 470, 480, 507, 508, 568, 569, 579, 580, 590, 600, 607, 608, 618, 628, 629, 639, 649

Offset

1,2

Comments

If a(n) has no obligation to contain one or more digits, then a(n)=a(n-1)+1. Terms computed by Duncan Booth. The sequence arising when we drop a(n)<a(n+1) is A156819

Links

Table of n, a(n) for n=1..53.

Crossrefs

Sequence in context: A261660 A004643 A284213 * A037422 A136735 A294549

Adjacent sequences: A156815 A156816 A156817 * A156819 A156820 A156821

Keyword

base,easy,nonn

Author

Eric Angelini, Feb 16 2009

Status

approved