OFFSET
1,5
COMMENTS
3*n = m + p.
EXAMPLE
a(1) = 1; degenerate triangle (1, 1, 2).
a(2) = 1; triangle (2, 3, 3).
a(3) = 1; triangle (3, 4, 5).
a(4) = 1; triangle (4, 5, 7).
a(5) = 2; triangles (5, 6, 9) and (5, 7, 8).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Philippe Deléham, Aug 13 2003
STATUS
approved