Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 2 and no column sum 2.

A255220

Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 2 and no column sum 2.

Terms

    a(0) =23a(1) =28a(2) =46a(3) =70a(4) =106a(5) =160a(6) =238a(7) =352a(8) =520a(9) =766a(10) =1126a(11) =1654a(12) =2428a(13) =3562a(14) =5224a(15) =7660a(16) =11230a(17) =16462a(18) =24130a(19) =35368a(20) =51838a(21) =75976a(22) =111352a(23) =163198a(24) =239182a(25) =350542a(26) =513748a(27) =752938a(28) =1103488a(29) =1617244

External references