Number of length n+1 0..3 arrays with the sum of the squares of adjacent differences multiplied by some arrangement of +-1 equal to zero.
A250272
Number of length n+1 0..3 arrays with the sum of the squares of adjacent differences multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =4a(1) =20a(2) =52a(3) =240a(4) =984a(5) =4412a(6) =20252a(7) =91808a(8) =406748a(9) =1759740a(10) =7455484a(11) =31056840a(12) =127719296a(13) =520368940a(14) =2106440916a(15) =8489650480a(16) =34118389900a(17) =136865613068a(18) =548408972596
External references
- oeis: A250272