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A057766
Total area of all n-celled polyominoes.
4
1, 2, 6, 20, 60, 210, 756, 2952, 11565, 46550, 187803, 763200, 3101683, 12627594, 51398640, 209268080, 851834453, 3467196936, 14109860408, 57413439000, 233584274238, 950220869136, 3865081177744, 15719992809672, 63930676119100
OFFSET
1,2
LINKS
Andrew Clarke, Isoperimetrical Polyominoes [Link updated by William Rex Marshall, Dec 16 2009]
FORMULA
a(n) = n*A000105(n).
CROSSREFS
Sequence in context: A363107 A136883 A289173 * A132353 A263900 A260696
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 04 2000
EXTENSIONS
More terms from David Wasserman, Oct 26 2003
STATUS
approved