Triangle read by rows, related to Bell numbers A000110: A216963 interlaced with A217202.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =4a(7) =7a(8) =5a(9) =2a(10) =11a(11) =28a(12) =28a(13) =16a(14) =5a(15) =41a(16) =131a(17) =153a(18) =118a(19) =71a(20) =16a(21) =162a(22) =690a(23) =872a(24) =892a(25) =759a(26) =272a(27) =61a(28) =715a(29) =4033