Boustrophedon transform of Bell numbers.

Terms

a(0) =1a(1) =2a(2) =5a(3) =16a(4) =60a(5) =258a(6) =1247a(7) =6686a(8) =39371a(9) =252688a(10) =1756920a(11) =13168178a(12) =105949517a(13) =911834394a(14) =8367625793a(15) =81642384468a(16) =844718036940