a(n) = Sum_{1 <= j <= i <= n} S(i,j), where S(i,j) are Stirling numbers of the second kind.
A024716
a(n) = Sum_{1 <= j <= i <= n} S(i,j), where S(i,j) are Stirling numbers of the second kind.
Terms
- a(0) =1a(1) =3a(2) =8a(3) =23a(4) =75a(5) =278a(6) =1155a(7) =5295a(8) =26442a(9) =142417a(10) =820987a(11) =5034584a(12) =32679021a(13) =223578343a(14) =1606536888a(15) =12086679035a(16) =94951548839a(17) =777028354998
External references
- oeis: A024716