OFFSET
1,4
EXAMPLE
a(1) = floor(1*log(1)/2) = 0;
a(2) = floor(2*log(2)/2) = 0.
MATHEMATICA
Array[Floor[#*Log[#]/2] &, 70] (* Robert G. Wilson v, Jul 21 2018 *)
PROG
(PARI) a(n) = floor(n*log(n)/2); \\ Michel Marcus, Jul 13 2018
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Marcos Librán López, Jul 10 2018
STATUS
approved