Number of distinct (unordered) pairs of partitions of a 10-element set that have Rand distance n.

Terms

a(0) =186300a(1) =887220a(2) =3060360a(3) =9883440a(4) =26969040a(5) =67288830a(6) =141778440a(7) =256463820a(8) =399874640a(9) =547907454a(10) =670419540a(11) =742419510a(12) =744780330a(13) =701747010a(14) =607809750a(15) =520591950a(16) =377521875a(17) =312082260a(18) =198307620a(19) =158606532a(20) =87210930a(21) =63688410a(22) =33243120a(23) =25703205a(24) =11343906a(25) =6764940a(26) =3272500a(27) =2003805a(28) =1532340a(29) =757080