a(n) = ceiling(1/(e - 1/0! - 1/1! - 1/2! - ... - 1/n!)).

A323274

a(n) = ceiling(1/(e - 1/0! - 1/1! - 1/2! - ... - 1/n!)).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =20a(4) =101a(5) =620a(6) =4420a(7) =35894a(8) =326946a(9) =3301574a(10) =36613057a(11) =442369756a(12) =5784470466a(13) =81391912093

External references