OFFSET
6,1
MATHEMATICA
k = 6;
Table[fp = {};
For[col = k, col > 0, col--,
For[row = 0, col + row*k <= n, row++,
AppendTo[fp, col + row*k]]];
LCM @@ Length /@ First[FindPermutation[Range[n], fp]], {n, k,
76}] (* Robert Price, Aug 26 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 10 2008, based on email from Samuel Minter (abulsme(AT)abulsme.com), May 08 2008, Aug 10 2008
EXTENSIONS
Extended beyond a(15) by R. J. Mathar, Aug 12 2008
STATUS
approved