Number of length-n sequences covering an initial interval of positive integers with exactly two maximal anti-runs, or with one pair of adjacent equal parts.
A337507
Number of length-n sequences covering an initial interval of positive integers with exactly two maximal anti-runs, or with one pair of adjacent equal parts.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =4a(4) =24a(5) =176a(6) =1540a(7) =15672a(8) =181916a(9) =2372512a(10) =34348932a(11) =546674120a(12) =9486840748a(13) =178285201008
External references
- oeis: A337507