Sum over all permutations of [n] of the maximum of the lengths of increasing or decreasing subsequences.
A321273
Sum over all permutations of [n] of the maximum of the lengths of increasing or decreasing subsequences.
Terms
- a(0) =1a(1) =4a(2) =14a(3) =70a(4) =396a(5) =2628a(6) =20270a(7) =175392a(8) =1686374a(9) =17920528a(10) =208454628a(11) =2629931688a(12) =35774761662a(13) =522351495684
External references
- oeis: A321273