Eigentriangle, row sums = A000110, the Bell numbers.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =2a(6) =6a(7) =2a(8) =2a(9) =5a(10) =22a(11) =6a(12) =4a(13) =5a(14) =15a(15) =92a(16) =22a(17) =12a(18) =10a(19) =15a(20) =52a(21) =426a(22) =92a(23) =44a(24) =30a(25) =30a(26) =52a(27) =203a(28) =2146a(29) =426