cp's OEIS Frontend

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.

%I A139310 #8 Aug 31 2013 19:33:48
%S A139310 1,12,14,155,160,211,271,292,419,548,572,591,645,653,710,735,744,760,
%T A139310 764,820,873,880,890,963,1537,1584,2191,2197,2245,2265,2352,2355,
%U A139310 11163,11253,11349,11380,11917,11932,12016,12235,12356,12453,12475,12520,12746
%N 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.
%C A139310 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.
%D A139310 E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
%H A139310 J. Schoenfield, <a href="/A139310/b139310.txt">Table of n, a(n) for n = 1..1000</a>
%Y A139310 Cf. A139311 (first differences), A005228, A030124.
%K A139310 nonn,base
%O A139310 1,2
%A A139310 _N. J. A. Sloane_ (based on Angelini's article), Jun 08 2008
%E A139310 Edited by _Charles R Greathouse IV_, Apr 28 2010
%E A139310 Correction to a(12) and more terms from _Jon E. Schoenfield_, May 23 2010