A056631 - OEIS

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A056631

a(n) is the total second area moment of all self-avoiding polygons of length 2n on the square lattice.

2

1, 8, 70, 560, 4358, 33160, 248998, 1851040, 13655432, 100126648, 730548788, 5308524968, 38442000664, 277565593032, 1999068564026, 14365917755936, 103038218758426, 737765745264544, 5274413814993896, 37655943519835560

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,2

LINKS

I. Jensen, Table of n, a(n) for n = 2..43 (from link below)

I. Jensen, More terms

CROSSREFS

Cf. A002931, A056625.

Sequence in context: A209074 A124152 A293069 * A190560 A266361 A298281

Adjacent sequences: A056628 A056629 A056630 * A056632 A056633 A056634

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 30 2000

EXTENSIONS

Title clarified by Sean A. Irvine, Apr 26 2022

STATUS

approved