a(n) = Sum_{k=0..n} binomial(n,k)*floor(sqrt(Bell(k)))*floor(sqrt(Bell(n-k))).

A192574

a(n) = Sum_{k=0..n} binomial(n,k)*floor(sqrt(Bell(k)))*floor(sqrt(Bell(n-k))).

Terms

    a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =84a(6) =282a(7) =968a(8) =3574a(9) =13526a(10) =53248a(11) =215288a(12) =889072a(13) =3749808a(14) =16120368a(15) =70569136a(16) =314384296a(17) =1424490556a(18) =6561255338a(19) =30706715780a(20) =145947430208a(21) =704170163362

External references