|
%I #12 Sep 16 2023 21:03:06
%S 1,2,3,123,12323,123123233,12323123123233123,
%T 2312312323312323123123233123123,
%U 123233123231231232331232312312323312323123123233123123123
%N 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.
%D C. A. Pickover, "Wonders of Numbers", Oxford University Press, 2001, chapter 122 '3 Weird Problems with 3 - Cleavage', pp. 272-274, 378.
%H C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," <a href="http://www.zentralblatt-math.org/zmath/en/search/?q=an:0983.00008&format=complete">Zentralblatt review</a>
%Y Cf. A065841, A001590.
%K nonn,base
%O 1,2
%A _Patrick De Geest_, Nov 27 2001
%E Offset and a(7) onward corrected by _Sean A. Irvine_, Sep 16 2023
|
