%I A073986
%S A073986 0,2,9,54,300,1296,6300,39312,262440,1679616
%N A073986 Number of strings of length n over Z_6 with trace 2 and subtrace 3.
%C A073986 Same as the number of strings of length n over Z_6 with trace 4 and subtrace 
               3.
%H A073986 F. Ruskey <a href="http://www.theory.csc.uvic.ca/~cos/inf/trs/str/Zq/
               str_tr_subtr_Z6.html">Number of strings over Z_6 of given trace and 
               subtrace</a>
%F A073986 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.
%Y A073986 Cf. A073971, A073972, A073973, A073974, A073975, A073976, A073977, A073978, 
               A073979, A073980, A073981, A073982, A073983, A073984, A073985, A073987, 
               A073988, A073989, A073990, A073991, A073992, A073993, A073994.
%Y A073986 Sequence in context: A124347 A080146 A074602 this_sequence A089436 A000168 
               A127128
%Y A073986 Adjacent sequences: A073983 A073984 A073985 this_sequence A073987 A073988 
               A073989
%K A073986 easy,nonn
%O A073986 1,2
%A A073986 Frank Ruskey, Nate Kube (fruskey(AT)cs.uvic.ca), Aug 16 2002