Triangle read by rows: Number of ideals in Partial Brauer Monoid PB_n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =9a(6) =16a(7) =41a(8) =50a(9) =51a(10) =81a(11) =225a(12) =306a(13) =322a(14) =323a(15) =441a(16) =1341a(17) =1966a(18) =2162a(19) =2187a(20) =2188a(21) =2601a(22) =8377a(23) =13138a(24) =15074a(25) =15474a(26) =15510a(27) =15511a(28) =16129a(29) =54545