Number of 0..6 arrays x(0..n-1) of n elements with zero n-1st difference.

A200152

Number of 0..6 arrays x(0..n-1) of n elements with zero n-1st difference.

Terms

    a(0) =1a(1) =7a(2) =25a(3) =107a(4) =381a(5) =1589a(6) =5153a(7) =18809a(8) =68813a(9) =256859a(10) =883247a(11) =4997167a(12) =12448095a(13) =76804553a(14) =181129817a(15) =522024177a(16) =1884097881a(17) =16163873397a(18) =38888615377a(19) =239811969005

External references