Number of n X 1 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal.

A206570

Number of n X 1 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal.

Terms

    a(0) =4a(1) =16a(2) =61a(3) =232a(4) =882a(5) =3353a(6) =12747a(7) =48460a(8) =184229a(9) =700378a(10) =2662606a(11) =10122349a(12) =38481829a(13) =146295209a(14) =556166085a(15) =2114359836a(16) =8038098037a(17) =30558194945a(18) =116172168341a(19) =441648229594

External references