A139310 Has two properties: concatenation of its digits is same string as concatenation of digits of its first differences and every number appears exactly one of the sequence or its first differences.

1, 12, 14, 155, 160, 211, 271, 292, 419, 548, 572, 591, 645, 653, 710, 735, 744, 760, 764, 820, 873, 880, 890, 963, 1537, 1584, 2191, 2197, 2245, 2265, 2352, 2355, 11163, 11253, 11349, 11380, 11917, 11932, 12016, 12235, 12356, 12453, 12475, 12520, 12746

Offset: 1

Author

N. J. A. Sloane (based on Angelini's article), Jun 08 2008

Keywords

• nonn
• base

Comments

When there is a choice in choosing the next term in the first differences, choose the smallest number not yet present in either the sequence or its first differences.

References

• E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.

Links

• J. Schoenfield, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A139311 (first differences), A005228, A030124.

Extensions

Edited by Charles R Greathouse IV, Apr 28 2010

Correction to a(12) and more terms from Jon E. Schoenfield, May 23 2010