OFFSET
0,2
COMMENTS
Triangular form: {1}, {2}, {1,3,5} {2,2,2,4,6}, {1,3,5,1,3,5,1,3,5,5,5}
FORMULA
1->{2}, 2->{1, 3, 5}, 3->{2}, 4->{5}, 5->{2, 4, 6}, 6->{5}
MATHEMATICA
s[1] = {2}; s[2] = {1, 3, 5}; s[3] = {2}; s[4] = {5}; s[5] = {2, 4, 6}; s[ 6] = {5}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] a0 = Table[p[i], {i, 0, 7}]; aa = Flatten[a0] MatrixForm[a0]
CROSSREFS
KEYWORD
nonn,uned
AUTHOR
Roger L. Bagula, May 09 2005
STATUS
approved