Number of circular sequences of distinct positive integers between 1 and n such that the sum of any two consecutive elements is at least n+1.
A108693
Number of circular sequences of distinct positive integers between 1 and n such that the sum of any two consecutive elements is at least n+1.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =15a(5) =36a(6) =80a(7) =244a(8) =677a(9) =2530a(10) =8460a(11) =36828a(12) =142939a(13) =702740a(14) =3088768a(15) =16830296a(16) =82359753a(17) =490949298
External references
- oeis: A108693