A359667 a(n) is the number of minimally prolific free polyominoes, i.e., that can generate the least possible number of children by adding a square.

1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 3, 1, 1, 5, 1, 1, 2, 2

Offset

1,8

Links

Table of n, a(n) for n=1..18.

John Mason, Illustrations

Example

a(8) = 5 because each of the following octominoes will generate the minimum number of children given by A255890(8) = 3:
  OO OOO  OO   O    O
  OO O O OOOO OOO   OOO
  OO OOO  OO   OOO OOO
  OO            O    O

Crossrefs

Cf. A000105, A255890.

Sequence in context: A340513 A180136 A346916 * A010129 A073050 A366426

Adjacent sequences: A359664 A359665 A359666 * A359668 A359669 A359670

Keyword

nonn,more

Author

John Mason, Jan 10 2023

Status

approved