Triangle of the square of the normalized, unsigned Stirling matrix of the first kind.

Terms

a(0) =1a(1) =3a(2) =1a(3) =23a(4) =12a(5) =1a(6) =330a(7) =215a(8) =30a(9) =1a(10) =7604a(11) =5700a(12) =1035a(13) =60a(14) =1a(15) =256620a(16) =212464a(17) =45675a(18) =3535a(19) =105a(20) =1a(21) =11923260a(22) =10645152a(23) =2582209a(24) =241080a(25) =9730a(26) =168a(27) =1a(28) =729524880a(29) =691560092