Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.

A246222

Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.

Terms

    a(0) =99a(1) =0a(2) =13303a(3) =530432a(4) =2715243a(5) =14872704a(6) =712988175a(7) =2114735616a(8) =14553496947a(9) =22338508875

External references