a(n)=floor(sqrt(2)*n)-2*floor(n/sqrt(2)).
1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0
2 seqfan posts
Sun Jul 18 07:54:43 CEST 2010 [seqfan] Re: I wonder
Sat Jul 17 11:00:58 CEST 2010 [seqfan] Re: I wonder
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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