Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222574
Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =2a(1) =1a(2) =5a(3) =10a(4) =25a(5) =128a(6) =292a(7) =1318a(8) =3640a(9) =14788a(10) =42332a(11) =172442a(12) =496654a(13) =2013238a(14) =5919842a(15) =23613110a(16) =70986662a(17) =279047430a(18) =854262098a(19) =3317468446a(20) =10317918394a(21) =39625082182a(22) =125013898578a(23) =475235749926
External references
- oeis: A222574