Number of length 7+2 0..n arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.

A253135

Number of length 7+2 0..n arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.

Terms

    a(0) =256a(1) =9205a(2) =119317a(3) =866944a(4) =4373134a(5) =16987236a(6) =54817908a(7) =153203700a(8) =382427902a(9) =870816931a(10) =1838833115a(11) =3646368028a(12) =6856114327a(13) =12312181791a(14) =21251285131a(15) =35433012016a(16) =57295925135a(17) =90169126459a(18) =138505569304a(19) =208154690963

External references