OFFSET
1,3
LINKS
T. D. Noe, Rows n = 1..100 of triangle, flattened
D. Bressoud, CNT.m Computational Number Theory Mathematica package.
EXAMPLE
Triangle:
0,
1, 2,
3, 4, 6,
5, 8, 10, 12,
15, 16, 20, 24, 30,
13, 21, 26, 28, 36, 42,
51, 64, 68, 80, 96, 102, 120,
37, 57, 63, 74, 76, 108, 114, 126,
41, 55, 75, 82, 88, 100, 110, 132, 150
MATHEMATICA
Needs["CNT`"]; nn = 10; t = Table[{}, {nn}]; n = 0; t[[1]] = {0}; left = nn - 1; While[left > 0, n++; p = PhiInverse[n]; cnt = Length[p]; If[cnt <= nn && t[[cnt]] == {}, t[[cnt]] = p; left--]]; t
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
T. D. Noe, Apr 11 2013
STATUS
approved