A001725

View A001725 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.

• A143491 → basis A013610 (match row sums)
  12, 21, 9 · 60, 141, 108, 27 … row sums 42, 336, 3024, 30240, 332640, 3991680, …
  (−∞, 0] nonnegative rational roots
• A144699: Triangle of 5-Eulerian numbers. (match row sums)
  1 · 1, 5 · 1, 16, 25 · 1, 39, 171, 125 … row sums 1, 6, 42, 336, 3024, 30240, 332640, …
  A144699 (−∞, 0) nonnegative
• A130534 → basis A013611 (match row sums)
  1 · 2, 4 · 6, 20, 16 · 24, 104, 144, 64 … row sums 1, 6, 42, 336, 3024, 30240, 332640, …
  (−∞, 0] nonnegative rational roots
• Triangle, read by rows, T(n,k) = t(n-k, k) where t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), and f(x) = x + 3. (match row sums)
  9, 24, 9 · 27, 141, 141, 27 · 81, 726, 1410, 726, 81 … row sums 42, 336, 3024, 30240, 332640, 3991680, …
  (−∞, 0) nonnegative
• A136124 → basis A013610 (match row sums)
  1 · 3, 3 · 12, 21, 9 · 60, 141, 108, 27 … row sums 1, 6, 42, 336, 3024, 30240, 332640, …
  (−∞, 0] nonnegative rational roots