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A255894 Polyiamond Family Planners: a(n) is the least number of children of a polyiamond of size n. 1
1, 1, 1, 3, 1, 3, 1, 3, 2, 2, 2, 5, 1, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..13.

EXAMPLE

a(7) = 3 because the 7-triangle polyiamond

  ____________

  \          /\

   \        /  \

    \      /    \  a

     \    /      \

      \  /        \      b

       \/__________\___________

       /\          /\          /

      /  \        /  \        /

     /    \      /    \      /

    /      \    /      \    /  c

   /        \  /        \  /

  /__________\/__________\/

  \          /

   \        /

    \      /

     \    /

      \  /

       \/

has three 8-triangle children created by adding a triangle to position a, b or c.

CROSSREFS

Cf. A000577, A255890.

Sequence in context: A074122 A335182 A319992 * A135023 A087822 A163378

Adjacent sequences:  A255891 A255892 A255893 * A255895 A255896 A255897

KEYWORD

nonn,more

AUTHOR

Gordon Hamilton, Mar 09 2015

STATUS

approved

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Last modified August 12 09:05 EDT 2020. Contains 336438 sequences. (Running on oeis4.)