A127773

View A127773 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.

• A127773: Triangle read by rows: row n consists of n-1 zeros followed by n(n+1)/2. (identification, match triangle)
  A010054 → reverse
  1 · 0, 3 · 0, 0, 6 · 0, 0, 0, 10 … row sums 1, 3, 6, 10, 15, 21, 28, 36, …
  A127773 [−1, 0] nonnegative rational roots