Triangle read by rows: T(n,k) = number of pairs of partitions of n that have block distance k (n >= 2, 2 <= k <= n).

A193297

Triangle read by rows: T(n,k) = number of pairs of partitions of n that have block distance k (n >= 2, 2 <= k <= n).

Terms

    a(0) =1a(1) =3a(2) =7a(3) =12a(4) =28a(5) =65a(6) =50a(7) =140a(8) =325a(9) =811a(10) =225a(11) =700a(12) =1950a(13) =4866a(14) =12762a(15) =1092a(16) =3675a(17) =11375a(18) =34062a(19) =89334a(20) =244588a(21) =5684a(22) =20384a(23) =68250a(24) =227080a(25) =714672a(26) =1956704a(27) =5574956a(28) =31572a(29) =119364

External references