a(n) is the number of 4 element sets of distinct integer sided strict rectangles that fill an n X n square.

A384724

a(n) is the number of 4 element sets of distinct integer sided strict rectangles that fill an n X n square.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =5a(5) =15a(6) =39a(7) =70a(8) =132a(9) =197a(10) =311a(11) =421a(12) =606a(13) =771a(14) =1047a(15) =1275a(16) =1655a(17) =1968a(18) =2466a(19) =2863a(20) =3510a(21) =4004a(22) =4802a(23) =5416a(24) =6384a(25) =7116a(26) =8286a(27) =9144a(28) =10517a(29) =11535

External references