A205404 - OEIS

%I #11 Dec 06 2021 13:24:33

%S 2,4,4,6,6,12,9,9,20,12,12,16,25,16,16,20,36,20,20,36,25,42,25,25,56,

%T 30,36,30,30,36,56,36,42,36,36,42,49,42,64,42,42,72,49,56,49,110,49,

%U 49,100,56,81,56,110,56,56,72,121,64,169,64,81,64,64,100,81,72

%N Least s(k) such that n divides s(k)-s(j) for some j < k, where s(j) = floor((j+1)^2/2)/2.

%C For a guide to related sequences, see A204892.

%t (See the program at A205402.)

%Y Cf. A205402, A204892.

%K nonn

%O 1,1

%A _Clark Kimberling_, Jan 27 2012

%E Definition corrected by _Clark Kimberling_, Dec 05 2021