The Riordan square of the Bell numbers. Triangle T(n, k), 0 <= k <= n, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =1a(6) =5a(7) =9a(8) =5a(9) =1a(10) =15a(11) =29a(12) =20a(13) =7a(14) =1a(15) =52a(16) =102a(17) =77a(18) =35a(19) =9a(20) =1a(21) =203a(22) =392a(23) =302a(24) =157a(25) =54a(26) =11a(27) =1a(28) =877a(29) =1641