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Bit-masks of A068221 shown in binary.
3

%I #3 Jun 27 2012 14:01:33

%S 1,11,11011,1101100011011,1101100011011000001101100011011,

%T 110110001101100000110110001101100000000001101100011011000001101100011011,

%U 110110001101100000110110001101100000000001101100011011000001101100011011000000000000110110001101100000110110001101100000000001101100011011000001101100011011

%N Bit-masks of A068221 shown in binary.

%Y The width of central gap of the term a(n) (n>1)= 0, 1, 3, 5, 10, 12, ... is given by A068059(n-1)-1. Cf. A068224, A068739.

%K nonn

%O 1,2

%A _Antti Karttunen_, Feb 26 2002