|
|
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.
|
|
2
|
|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
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
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|