Number of length n+2 0..4 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
A250557
Number of length n+2 0..4 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =13a(1) =117a(2) =761a(3) =5105a(4) =31525a(5) =177421a(6) =937817a(7) =4803653a(8) =24257725a(9) =121800949a(10) =610147053a(11) =3053493273a(12) =15274472475a(13) =76391277073a(14) =382008613455
External references
- oeis: A250557