Number of partitions of [n] whose blocks are ordered with increasing least elements and where block i (except possibly the last) has size i.

A362639

Number of partitions of [n] whose blocks are ordered with increasing least elements and where block i (except possibly the last) has size i.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =15a(8) =36a(9) =70a(10) =120a(11) =756a(12) =2800a(13) =7920a(14) =18900a(15) =40040a(16) =388080a(17) =2106000a(18) =8408400a(19) =27489000a(20) =77837760a(21) =197520960a(22) =2756754000a(23) =20903929200a(24) =113809696000a(25) =497097881280

External references