Number of distinct non-extendable sequences (x(1),x(2),...,x(k)) such that each x(i) is in {1,2,...,n} and (x(j) AND x(i)) <> x(j) for i=2..k, j=1..i-1.
A053623
Number of distinct non-extendable sequences (x(1),x(2),...,x(k)) such that each x(i) is in {1,2,...,n} and (x(j) AND x(i)) <> x(j) for i=2..k, j=1..i-1.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =14a(4) =38a(5) =126a(6) =252a(7) =1662a(8) =7180a(9) =39430a(10) =111064a(11) =803876a(12) =2863992a(13) =12123360a(14) =24246720a(15) =329012784a(16) =2602608516
External references
- oeis: A053623