OFFSET
1,1
COMMENTS
Each vertex has three connections in analogy to three tone musical chords and there are twelve vertices in analogy to a 12 tone scale. The sequence that results seems to be limited by the starting configuration: no "12" shows up in the first 5 substitutions.
FORMULA
Substitution of the form for 3 for 12 types: a(m)={a(n),a(o),a(p)}
EXAMPLE
If "1" is the Note "A", then the chord substitution is A->B, Eflat,E
MATHEMATICA
Clear[s] s[1] = {2, 6, 7}; s[2] = {1, 3, 8}; s[3] = {2, 4, 9}; s[4] = {3, 5, 10}; s[5] = {4, 6, 11}; s[6] = {1, 5, 12}; s[7] = {1, 8, 12}; s[8] = {2, 7, 9}; s[9] = {3, 8, 10}; s[10] = {4, 9, 11}; s[11] = {5, 10, 12}; s[12] = {6, 7, 11}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]]; aa = p[5]
CROSSREFS
KEYWORD
nonn,uned
AUTHOR
Roger L. Bagula, Sep 27 2007
STATUS
approved