login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A073984 Number of strings of length n over Z_6 with trace 2 and subtrace 1. 22
0, 1, 9, 36, 210, 1296, 7056, 40824, 262440, 1700352, 10478160, 62355744, 367960320, 2176782336, 12958657344, 77716392192, 468205557120, 2821109907456, 16960580969472, 101758315958784, 609954817881600, 3656220357427200, 21926486787222528, 131557435432187904 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Same as the number of strings of length n over Z_6 with trace 4 and subtrace 1.
LINKS
FORMULA
a(n; t, s) = a(n-1; t, s) + a(n-1; t+5, s+5t+1) + a(n-1; t+4, s+4t+4) + a(n-1; t+3, s+3t+3) + a(n-1; t+2, s+2t+2) + a(n-1; t+1, s+t+1) where t is the trace and s is the subtrace.
CROSSREFS
Sequence in context: A110752 A094973 A038780 * A036907 A027381 A335783
KEYWORD
easy,nonn
AUTHOR
Frank Ruskey and Nate Kube, Aug 16 2002
EXTENSIONS
Terms a(11) 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)