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

A251131

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

Terms

    a(0) =133a(1) =416a(2) =1002a(3) =2264a(4) =4786a(5) =9786a(6) =19548a(7) =38674a(8) =76196a(9) =150192a(10) =296626a(11) =587420a(12) =1166206a(13) =2320222a(14) =4623712a(15) =9225118a(16) =18421072a(17) =36804772a(18) =73562342a(19) =147065944a(20) =294059610a(21) =588031298a(22) =1175956612a(23) =2351786634a(24) =4703423196a(25) =9406669816

External references