1,3

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

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(2;3,2)=2 since the two 5-ary strings of trace 3, subtrace 2 and length 2 are { 12, 21 }.

Cf. A073963, A073964, A073965, A073966, A073967, A073968, A073969.

Sequence in context: A050510 A055281 A056385 this_sequence A074009 A002446 A002934

Adjacent sequences: A073967 A073968 A073969 this_sequence A073971 A073972 A073973

easy,nonn

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