Number of nX4 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.

A274891

Number of nX4 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.

Terms

    a(0) =4a(1) =36a(2) =37a(3) =104a(4) =275a(5) =753a(6) =2049a(7) =5602a(8) =15305a(9) =41866a(10) =114475a(11) =313122a(12) =856462a(13) =2342559a(14) =6407780a(15) =17526908a(16) =47941766a(17) =131135884a(18) =358697083a(19) =981151642a(20) =2683758871a(21) =7340930445a(22) =20079778989a(23) =54924550811a(24) =150236085835a(25) =410943350656

External references