Number of tilings of a 10 X n rectangle using 2n pentominoes of shape Y.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =10a(6) =0a(7) =0a(8) =0a(9) =0a(10) =350a(11) =0a(12) =0a(13) =0a(14) =296a(15) =8954a(16) =50a(17) =0a(18) =0a(19) =13516a(20) =242820a(21) =2760a(22) =0a(23) =5832a(24) =602980a(25) =6591140a(26) =126088a(27) =496a(28) =442978a(29) =22506998