OFFSET
1,2
EXAMPLE
Row 4 of triangle A126571 is (4,7,5,7).
So a(4) is the numerator of 1/4 +1/7 +1/5 + 1/7 = 103/84.
MATHEMATICA
f[m_, n_] := Block[{k = 0, c = n}, While[c > 0, k++; While[GCD[k, m] > 1, k++ ]; c--; ]; k]; Table[Numerator@Sum[1/f[m, n], {m, n}], {n, 22}] (* Ray Chandler, Dec 29 2006 *)
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
Leroy Quet, Dec 28 2006
EXTENSIONS
Extended by Ray Chandler, Dec 29 2006
STATUS
approved