A245391

View A245391 at the OEIS

identification: the entry's rule defines the sequence for every index; tail: the sequence is the entry's tail after some prefix rows; match_*: finite agreement only.

• A085880 → D (match row sums)
  1 · 4, 4 · 15, 30, 15 · 56, 168, 168, 56 … row sums 0, 1, 8, 60, 448, 3360, 25344, 192192, …
  (−∞, 0] nonnegative rational roots