Number of (n+2)X(1+2) 0..1 arrays x(i,j) with every row sum{j*x(i,j), j=1..1+2} equal, and every column sum{i*x(i,j), i=1..n+2} equal, with upper left element zero.

A232648

Number of (n+2)X(1+2) 0..1 arrays x(i,j) with every row sum{j*x(i,j), j=1..1+2} equal, and every column sum{i*x(i,j), i=1..n+2} equal, with upper left element zero.

Terms

    a(0) =2a(1) =2a(2) =1a(3) =1a(4) =5a(5) =8a(6) =1a(7) =1a(8) =36a(9) =63a(10) =1a(11) =1a(12) =362a(13) =658a(14) =1a(15) =1a(16) =4111a(17) =7637a(18) =1a(19) =1a(20) =49911a(21) =93847a(22) =1a(23) =1a(24) =632603a(25) =1199893a(26) =1a(27) =1a(28) =8273611a(29) =15796440

External references