A001720

View A001720 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.

• A132393 → basis A013611 (match row sums)
  1 · 1, 4 · 2, 12, 16 · 6, 44, 96, 64 … row sums 1, 5, 30, 210, 1680, 15120, 151200, …
  (−∞, 0] nonnegative rational roots
• A143491 → basis A013609 (match row sums)
  12, 14, 4 · 60, 94, 48, 8 · 360, 684, 476, 144, 16 … row sums 30, 210, 1680, 15120, 151200, 1663200, …
  (−∞, 0] nonnegative rational roots
• A144698: Triangle of 4-Eulerian numbers. (match row sums)
  1 · 1, 4 · 1, 13, 16 · 1, 32, 113, 64 … row sums 1, 5, 30, 210, 1680, 15120, 151200, …
  A144698 (−∞, 0) nonnegative
• A130534 → basis A013610 (match row sums)
  1 · 2, 3 · 6, 15, 9 · 24, 78, 81, 27 … row sums 1, 5, 30, 210, 1680, 15120, 151200, …
  (−∞, 0] nonnegative rational roots
• A136124 → basis A013609 (match row sums)
  1 · 3, 2 · 12, 14, 4 · 60, 94, 48, 8 … row sums 1, 5, 30, 210, 1680, 15120, 151200, …
  (−∞, 0] nonnegative rational roots