T(n,m) = Number of ways to partition an nXm grid into 4 connected equal-area regions.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =1a(7) =0a(8) =0a(9) =1a(10) =0a(11) =5a(12) =0a(13) =5a(14) =0a(15) =0a(16) =0a(17) =23a(18) =23a(19) =0a(20) =0a(21) =0a(22) =11a(23) =0a(24) =117a(25) =0a(26) =11a(27) =0a(28) =1a(29) =0