A056632 a(n) is the total perimeter of all self-avoiding polygons of area n on the square lattice.

4, 12, 48, 188, 740, 2936, 11672, 46388, 184352, 732608, 2911040, 11565964, 45949600, 182538264, 725108640, 2880270032, 11440564516, 45441048384, 180483666608, 716832688844, 2847012624636, 11307166941460

Offset

1,1

Links

I. Jensen, Table of n, a(n) for n = 1..40 (from link below)

I. Jensen, More terms

Crossrefs

Cf. A002931, A056625.

Sequence in context: A149384 A108508 A019309 * A149385 A092898 A110594

Adjacent sequences: A056629 A056630 A056631 * A056633 A056634 A056635

Keyword

nonn

Author

N. J. A. Sloane, Aug 30 2000

Extensions

Title clarified by Sean A. Irvine, Apr 26 2022

Status

approved