Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
A222511
Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
Terms
- a(0) =0a(1) =4a(2) =4a(3) =15a(4) =35a(5) =170a(6) =441a(7) =2192a(8) =5416a(9) =26660a(10) =66209a(11) =328121a(12) =816736a(13) =4074688a(14) =10172187a(15) =51053330a(16) =127212627a(17) =643151980a(18) =1598614930a(19) =8135779154a(20) =20183768037a(21) =103256080822a(22) =255983883834
External references
- oeis: A222511