Number of ways of seating n people around a table for the second time without anyone sitting next to the same person as they did the first time.
A089222
Number of ways of seating n people around a table for the second time without anyone sitting next to the same person as they did the first time.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =10a(6) =36a(7) =322a(8) =2832a(9) =27954a(10) =299260a(11) =3474482a(12) =43546872a(13) =586722162a(14) =8463487844a(15) =130214368530
External references
- oeis: A089222