68882domain: NAppears in sequencesa(n) = F(n+2) - 2^[ (n+1)/2 ] - 2^[ n/2 ] + 1.at n=23A005673Number of length 3 arrays x(i), i=1..3 with x(i) in i..i+n and no value appearing more than 2 times.at n=39A250352Coefficients in asymptotic expansion of sequence A309618.at n=9A326983