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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, 12323123123233312, 2312312323312323123123233312312, 123233123231231232333122312312323312323123123233312312312 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

C. A. Pickover, "Wonders of Numbers", Oxford University Press, 2001, chapter 122 '3 Weird Problems with 3 - Cleavage', pp. 272-274, 378.

LINKS

Table of n, a(n) for n=0..8.

C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Zentralblatt review

CROSSREFS

Cf. A065841, A001590.

Sequence in context: A208247 A102697 A041813 * A065841 A051177 A258968

Adjacent sequences:  A065839 A065840 A065841 * A065843 A065844 A065845

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 27 2001

STATUS

approved

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Last modified February 23 06:50 EST 2020. Contains 332159 sequences. (Running on oeis4.)