A093475 Beginning with 1, numbers such that no term can arise as a substring of the right concatenation of any combination of the previous terms.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 111, 200, 221, 223, 224, 225, 226, 227, 228, 229, 300, 400, 500, 600, 700, 800, 900, 1000, 1331, 1332, 1333, 1334, 1335, 1336, 1337, 1338, 1339, 1441, 1442, 1443, 1444, 1445, 1446, 1447, 1448

Offset

1,2

Links

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

Example

11 is not a member as it can be obtained as a substring of the concatenation of previous terms 1 and 10.

Crossrefs

Sequence in context: A202272 A180480 A080459 * A032571 A070958 A051596

Adjacent sequences: A093472 A093473 A093474 * A093476 A093477 A093478

Keyword

base,less,nonn

Author

Amarnath Murthy, Apr 07 2004

Extensions

Corrected and extended by David Wasserman, Oct 02 2006

Status

approved