Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
A222770
Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
Terms
- a(0) =0a(1) =3a(2) =4a(3) =11a(4) =18a(5) =73a(6) =152a(7) =470a(8) =1022a(9) =3361a(10) =7840a(11) =23386a(12) =57626a(13) =172387a(14) =434280a(15) =1257025a(16) =3275034a(17) =9399647a(18) =24776572a(19) =70325187a(20) =188540168a(21) =531573662a(22) =1436226680a(23) =4032772569a(24) =10987025446a(25) =30742228871a(26) =84180549328a(27) =235159618106
External references
- oeis: A222770