The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A074030 Number of binary Lyndon words of length n with trace 1 and subtrace 1 over Z_2. 7
 0, 0, 0, 1, 2, 3, 5, 8, 13, 24, 45, 85, 160, 297, 550, 1024, 1920, 3626, 6885, 13107, 24989, 47709, 91225, 174760, 335462, 645120, 1242600, 2396745, 4628480, 8948385, 17318945, 33554432, 65074253, 126320640, 245424829, 477218560, 928645120, 1808414181, 3524082400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Same as the number of binary Lyndon words of length n with trace 1 and subtrace 1 over GF(2). LINKS Max Alekseyev, PARI/GP scripts for miscellaneous math problems FORMULA a(2n) = A042981(2n), a(2n+1) = A042982(2n+1). This follows from Cattell et al. (see A042979), Main Theorem on p. 33 and Theorem 4 on p. 44. CROSSREFS Cf. A074027, A074028, A074029. Sequence in context: A096796 A257418 A125730 * A024318 A324738 A132915 Adjacent sequences:  A074027 A074028 A074029 * A074031 A074032 A074033 KEYWORD easy,nonn AUTHOR Frank Ruskey and Nate Kube, Aug 21 2002 EXTENSIONS Corrected by Franklin T. Adams-Watters, Oct 25 2006 Terms a(33) onward from Max Alekseyev, Apr 09 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 13 08:27 EDT 2020. Contains 336442 sequences. (Running on oeis4.)