Number of 4X4X4 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors.

A214354

Number of 4X4X4 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors.

Terms

    a(0) =160a(1) =2853a(2) =23554a(3) =127813a(4) =529006a(5) =1807653a(6) =5349708a(7) =14150061a(8) =34190300a(9) =76678305a(10) =161533230a(11) =322614617a(12) =615330522a(13) =1127418361a(14) =1993875448a(15) =3417225641a(16) =5694545880a(17) =9252943437a(18) =14695473146a(19) =22859815485a(20) =34892402886a(21) =52341084797

External references