1,4

Same as the number of strings of length n over Z_5 with trace 2 and subtrace 3. Same as the number of strings of length n over Z_5 with trace 3 and subtrace 3. Same as the number of strings of length n over Z_5 with trace 4 and subtrace 2. Same as the number of strings of length n over GF(5) with trace 1 and subtrace 2. Same as the number of strings of length n over GF(5) with trace 2 and subtrace 3. Same as the number of strings of length n over GF(5) with trace 3 and subtrace 3. Same as the number of strings of length n over GF(5) with trace 4 and subtrace 2.

F. Ruskey, Strings over Z_5 of given trace and subtrace

F. Ruskey, Strings over GF(5) of given trace and subtrace

a(n; t, s) = a(n-1; t, s) + a(n-1; t+4, s+4t+1) + a(n-1; t+3, s+3t+4) + a(n-1; t+2, s+2t+4) + a(n-1; t+1, s+t+1)

a(3;1,2)=1 since the one 5-ary string of trace 1, subtrace 2 and length 3 is { 222 }.

Cf. A073963, A073964, A073965, A073966, A073967, A073969, A073970.

Sequence in context: A041770 A156255 A004634 this_sequence A125330 A126488 A005551

Adjacent sequences: A073965 A073966 A073967 this_sequence A073969 A073970 A073971

easy,nonn

Frank Ruskey, Nate Kube (fruskey(AT)cs.uvic.ca), Aug 15 2002