Number of permutations of 0..(n-1) representable as consecutive sums of 7 adjacent elements of a sequence of n+6 nonnegative integers.
A180210
Number of permutations of 0..(n-1) representable as consecutive sums of 7 adjacent elements of a sequence of n+6 nonnegative integers.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =128a(8) =258a(9) =536a(10) =1190a(11) =2918a(12) =7954a(13) =23914a(14) =76404
External references
- oeis: A180210