A102234 Slowest increasing sequence such that no digit "d" has a copy of itself at "d" digits, left or right.

1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 21, 31, 32, 34, 35, 36, 37, 38, 39, 41, 42, 51, 52, 53, 54, 56, 57, 58, 59, 61, 62, 63, 71, 72, 73, 74, 75, 76, 78, 79, 81, 82, 83, 84, 121, 312, 412

Offset

1,2

Links

Table of n, a(n) for n=1..54.

Example

Take integer [78] in the sequence for instance : ...73 74 75 76 [78] 79 81 82 83...
The digit "7", jumping 7 digits back, ends on "3" [73] which is not "7"; jumping 7 digits to the right ends on "2" which, again, is not a "7". The same can be said for "8" (left -> "7"; right -> "3")

Crossrefs

Cf. A102150.

Sequence in context: A039274 A102487 A343951 * A174908 A344543 A082757

Adjacent sequences: A102231 A102232 A102233 * A102235 A102236 A102237

Keyword

base,easy,nonn

Author

Eric Angelini, Feb 18 2005

Status

approved