cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A363200 Number of connected animals formed from n 6-gon connected truncated octahedra, avoiding connected squares.

Original entry on oeis.org

1, 1, 2, 5, 15, 55, 248, 1256, 6844, 38930, 226961, 1345641, 8072770, 48882245, 298237393
Offset: 1

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Keywords

Comments

Rotations and reflections are identified.
Avoiding connected squares is the same as avoiding neighbors at [0,0,+-2], [0,+-2,0], and [+-2,0,0].
Allowing connected squares gives A038171.

Examples

			The animals for n <= 5 are:
n=1:
  0,0,0
n=2:
  0,0,0; 1,1,1
n=3:
  0,0,0; 0,2,2; 1,1,1
  0,0,0; 1,1,1; 2,2,2
n=4:
  0,0,0; 0,2,2; 1,1,1; 1,3,3
  0,0,0; 0,2,2; 1,1,1; 2,0,2
  0,0,0; 1,1,1; 1,3,3; 2,2,2
  0,0,0; 1,1,1; 2,2,2; 3,3,3
  0,0,1; 1,1,0; 1,3,2; 2,2,1
n=5:
  0,0,0; 0,2,2; 0,4,4; 1,1,1; 1,3,3
  0,0,0; 0,2,2; 1,1,1; 1,3,3; 2,0,2
  0,0,0; 0,2,2; 1,1,1; 1,3,3; 2,2,4
  0,0,0; 0,2,2; 1,1,1; 1,3,3; 2,4,4
  0,0,0; 0,2,2; 1,1,1; 2,0,2; 2,2,0
  0,0,0; 0,2,4; 1,1,1; 1,3,3; 2,2,2
  0,0,0; 0,4,4; 1,1,1; 1,3,3; 2,2,2
  0,0,0; 1,1,1; 1,3,3; 2,2,2; 3,1,3
  0,0,0; 1,1,1; 2,2,2; 2,4,4; 3,3,3
  0,0,0; 1,1,1; 2,2,2; 3,3,3; 4,4,4
  0,0,1; 0,2,3; 1,1,0; 1,3,2; 2,2,1
  0,0,1; 0,2,3; 1,1,2; 1,3,0; 2,2,1
  0,0,1; 0,4,1; 1,1,0; 1,3,2; 2,2,1
  0,0,1; 1,1,0; 2,2,1; 2,4,3; 3,3,2
  0,0,1; 1,1,0; 2,2,1; 3,3,2; 4,4,1
		

Extensions

a(14) and a(15) from Joerg Arndt, Dec 09 2023