Triangle read by rows. Number of perfect matchings by number of connected components.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =10a(8) =4a(9) =1a(10) =0a(11) =74a(12) =24a(13) =6a(14) =1a(15) =0a(16) =706a(17) =188a(18) =42a(19) =8a(20) =1a(21) =0a(22) =8162a(23) =1808a(24) =350a(25) =64a(26) =10a(27) =1a(28) =0a(29) =110410