A056633 a(n) is the total squared perimeter of all self-avoiding polygons of area n on the square lattice.

16, 72, 384, 1864, 8720, 40064, 180992, 805416, 3542720, 15437280, 66739168, 286614344, 1223894208, 5200593136, 22003683264, 92745730384, 389613088944, 1631810452416, 6816075114112, 28401442383848

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, A056632.

Sequence in context: A279905 A146748 A029872 * A248464 A232572 A363794

Adjacent sequences: A056630 A056631 A056632 * A056634 A056635 A056636

Keyword

nonn

Author

N. J. A. Sloane, Aug 30 2000

Extensions

Title clarified by Sean A. Irvine, Apr 26 2022

Status

approved