Number of permutations of 0..(n-1) representable as consecutive sums of 2 adjacent elements of a sequence of n+1 nonnegative integers.
A180205
Number of permutations of 0..(n-1) representable as consecutive sums of 2 adjacent elements of a sequence of n+1 nonnegative integers.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =12a(4) =44a(5) =176a(6) =768a(7) =4000a(8) =22896a(9) =142336a(10) =967040a(11) =7258368a(12) =57919872a(13) =490253312a(14) =4455645952a(15) =43468799232a(16) =445393216256
External references
- oeis: A180205