Number of length n+2 0..2 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
A250555
Number of length n+2 0..2 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =5a(1) =25a(2) =83a(3) =297a(4) =989a(5) =3113a(6) =9611a(7) =29257a(8) =88503a(9) =266769a(10) =802699a(11) =2412545a(12) =7246311a(13) =21755889a(14) =65301163a(15) =195969945a(16) =588042095a(17) =1764390025a(18) =5293696363a(19) =15882140601a(20) =47648522543a(21) =142949767457a(22) =428857697715
External references
- oeis: A250555