Number of permutations of 0..(n-1) representable as consecutive sums of 6 adjacent elements of a sequence of n+5 nonnegative integers.
A180209
Number of permutations of 0..(n-1) representable as consecutive sums of 6 adjacent elements of a sequence of n+5 nonnegative integers.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =130a(8) =278a(9) =654a(10) =1728a(11) =5196a(12) =16948a(13) =61518a(14) =238060a(15) =999268a(16) =4315386
External references
- oeis: A180209