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A065842
a(1) = 1; a(2) = 2; a(3) = 3; a(n) is concatenation of a(n-3), a(n-2) and a(n-1); the digits on the right of the first 3 (if any) are then swapped with the digits on the left.
1
1, 2, 3, 123, 12323, 123123233, 12323123123233123, 2312312323312323123123233123123, 123233123231231232331232312312323312323123123233123123123
OFFSET
1,2
REFERENCES
C. A. Pickover, "Wonders of Numbers", Oxford University Press, 2001, chapter 122 '3 Weird Problems with 3 - Cleavage', pp. 272-274, 378.
LINKS
C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Zentralblatt review
CROSSREFS
Sequence in context: A208247 A102697 A041813 * A065841 A051177 A371271
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Nov 27 2001
EXTENSIONS
Offset and a(7) onward corrected by Sean A. Irvine, Sep 16 2023
STATUS
approved