Number of n X 1 0..5 arrays with no element equal to another at a city block distance of exactly two, and new values 0..5 introduced in row major order.

A222867

Number of n X 1 0..5 arrays with no element equal to another at a city block distance of exactly two, and new values 0..5 introduced in row major order.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =7a(4) =20a(5) =67a(6) =254a(7) =1057a(8) =4700a(9) =21847a(10) =104474a(11) =508477a(12) =2501480a(13) =12386227a(14) =61570694a(15) =306778297a(16) =1530678260a(17) =7643776207a(18) =38190084914a(19) =190864134517a(20) =954061999040

External references