Number of permutations of 0..n-1 with no element greater than or equal to the sum of its neighbors.
A180888
Number of permutations of 0..n-1 with no element greater than or equal to the sum of its neighbors.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =8a(5) =24a(6) =80a(7) =504a(8) =4600a(9) =36176a(10) =304888a(11) =2842472a(12) =29790752a(13) =331382672a(14) =3962130640a(15) =50186636768a(16) =680693513480
External references
- oeis: A180888