%I #4 Aug 31 2022 13:30:36
%S 3,6,10,13,16,19,22,25,28,32,35,37,41,44,47,50,54,57,59,63,66,69,72,
%T 75,78,81,85,88,91,94,97,100,103,107,110,112,116,119,122,125,128,131,
%U 134,138,141,144,147,150,153,156,160,163,165,169,172,175,178,182,185
%N a(n) = [(n + 1)/(1 - 1/r)] - [n - n/r] where r = sqrt(2) and [] denotes the floor function.
%F a(n) = [(n + 1)/(1 - 1/r) - [n - n/r]] with r and [] as in the name.
%p a := n -> floor((n + 1)/(1 - 1/r)) - floor(n - n/r): seq(a(n), n = 0..58);
%Y Cf. A285684.
%K nonn
%O 0,1
%A _Peter Luschny_, Aug 31 2022