# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a217211 Showing 1-1 of 1 %I A217211 #22 Apr 24 2013 19:29:44 %S A217211 0,2,2,6,12,26,52,110,214,438,876,1762,3524,7084,14144,28360,56720, %T A217211 113542,227084,454448,908804,1818168,3636336,7273614,14547228, %U A217211 29096678,58192994,116390424,232780848,465569860,931139720,1862297158,3724592874,7449221168,14898442336,29796952652,59593905304 %N A217211 Number of binary sequences of length n with curling number 2. %H A217211 N. J. A. Sloane, Table of n, a(n) for n = 1..104 [Entries up through 51 found by direct search (see triangle A216955), later entries obtained from a recurrence.] %Y A217211 Column 2 of A216955. Cf. A122536, A217212. %K A217211 nonn %O A217211 1,2 %A A217211 _N. J. A. Sloane_, Oct 01 2012 %E A217211 a(33)-a(37) from _Allan Wilks_, Oct 06 2012 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE