Number of (n+1)X(4+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.

A251024

Number of (n+1)X(4+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.

Terms

    a(0) =6321a(1) =23404a(2) =51347a(3) =119632a(4) =257578a(5) =563271a(6) =1199576a(7) =2590598a(8) =5601754a(9) =12305560a(10) =27283810a(11) =61222845a(12) =138410707a(13) =315015070a(14) =719847225a(15) =1649954072a(16) =3788495903a(17) =8709393619a(18) =20035602376a(19) =46111319584a(20) =106149006168a(21) =244393023772

External references