OFFSET
0,2
FORMULA
a(n) = n*round(n*(1+sqrt(5))/2)*round(round(n*(1+sqrt(5))/2)*(1+sqrt(5))/2). - Wesley Ivan Hurt, Apr 23 2021
MATHEMATICA
b[n_] := Round[n*GoldenRatio];
a[n_] := n*b[n]*b[b[n]];
Table[a[n], {n, 0, 36}] (* Jean-François Alcover, Dec 15 2017 *)
PROG
(PARI) b(n) = round(n*(1+sqrt(5))/2);
a(n) = n*b(n)*b(b(n)); \\ Michel Marcus, Dec 15 2017
CROSSREFS
KEYWORD
easy,nice,nonn
AUTHOR
Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 28 1999
STATUS
approved