Triangle corresponding to the partition array of the M_1 multinomials (A036038).

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =6a(6) =1a(7) =10a(8) =12a(9) =24a(10) =1a(11) =15a(12) =50a(13) =60a(14) =120a(15) =1a(16) =41a(17) =180a(18) =300a(19) =360a(20) =720a(21) =1a(22) =63a(23) =497a(24) =1260a(25) =2100a(26) =2520a(27) =5040a(28) =1a(29) =162