OFFSET
0,3
LINKS
Orap Andrew a.k.a. Dalgerok, Codeforces Round #553 - C. Problem for Nazar, on Codeforces.com, April 2019
PROG
(PARI) A307612(n, s=1, S, t, i=1)=until(n<i*=2, S+=(s-1+t=min(n+1-i, i))*t; s=s\/2+i); S
CROSSREFS
KEYWORD
nonn
AUTHOR
M. F. Hasler, Apr 18 2019
STATUS
approved