Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-1) and new values introduced in order 0..2.

A275261

Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-1) and new values introduced in order 0..2.

Terms

    a(0) =5a(1) =54a(2) =128a(3) =396a(4) =1440a(5) =5676a(6) =22844a(7) =93968a(8) =389820a(9) =1626348a(10) =6799728a(11) =28470780a(12) =119289068a(13) =500005184a(14) =2096208716a(15) =8789088828a(16) =36853587936a(17) =154536271820a(18) =648021215772

External references