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%I #12 May 07 2021 20:09:48
%S 0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,
%T 6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,
%U 0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0,2,6,4,0
%N Least significant digit of A077749(n).
%F a(n) = A077749(n) - 10*floor(A077749(n)/10).
%F a(4n-3) = 0, a(4n-2) = 2, a(4n-1) = 6, a(4n) = 4, n > 0. - _Sascha Kurz_, Jan 04 2003
%F a(n) = 3-3*cos(n*Pi/2)-sin(n*Pi/20. - _Wesley Ivan Hurt_, May 07 2021
%p seq((2^i-1-1) mod 10,i=1..160);
%Y Cf. A077749.
%K base,nonn
%O 0,2
%A _Amarnath Murthy_, Nov 20 2002
%E More terms from _Sascha Kurz_, Jan 04 2003
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