A search of the OEIS by Parity gives the following results: A073941 ,1,1,1,0,1,0,0,1,0,1,1,1,0,1,0,1,1,1,1,1,0,1,0,1,1,1,0,1,1,1,1,0,0,0,0,1,0,1,1,1,0,0, A005428 ,1,0,1,0,0,1,0,1,1,1,0,1,0,1,1,1,1,1,0,1,0,1,1,1,0,1,1,1,1,0,0,0,0,1, A079719 ,0,1,0,0,1,0,1,1,1,0,1,0,1,1,1,1,1,0,1,0,1,1,1,0,1,1,1,1,0,0,0,0,1,0,1,1,1,0,0,0, Jeremy Gardiner