One half of the number of permutations of [n] such that the differences have 5 runs with the same signs.
A000506
One half of the number of permutations of [n] such that the differences have 5 runs with the same signs.
Terms
- a(0) =61a(1) =841a(2) =7311a(3) =51663a(4) =325446a(5) =1910706a(6) =10715506a(7) =58258210a(8) =309958755a(9) =1623847695a(10) =8412276585a(11) =43220104041a(12) =220683627988
External references
- oeis: A000506