Number T(n,k) of partitions of [n] having exactly k blocks of size at least three; triangle T(n,k), n>=0, 0<=k<=floor(n/3), read by rows.

A355144

Number T(n,k) of partitions of [n] having exactly k blocks of size at least three; triangle T(n,k), n>=0, 0<=k<=floor(n/3), read by rows.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =1a(5) =10a(6) =5a(7) =26a(8) =26a(9) =76a(10) =117a(11) =10a(12) =232a(13) =540a(14) =105a(15) =764a(16) =2445a(17) =931a(18) =2620a(19) =11338a(20) =6909a(21) =280a(22) =9496a(23) =53033a(24) =48546a(25) =4900a(26) =35696a(27) =253826a(28) =324753a(29) =64295

External references