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A130131 Number of n-lobsters. 2
1, 1, 1, 2, 3, 6, 11, 23, 47, 105, 231, 532, 1224, 2872, 6739, 15955, 37776, 89779, 213381, 507949, 1209184, 2880382, 6861351, 16348887, 38955354, 92831577, 221219963, 527197861, 1256385522, 2994200524, 7135736613, 17005929485 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

LINKS

Eric Weisstein's World of Mathematics, Lobster

G. Li and F. Ruskey, C program

CROSSREFS

Cf. A000055, A130132.

Sequence in context: A198620 A198648 A198655 * A123465 A000055 A006787

Adjacent sequences:  A130128 A130129 A130130 * A130132 A130133 A130134

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), May 11, 2007

EXTENSIONS

a(15)-a(32)from W. Bomfim, Feb, 23 2011

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Last modified February 16 10:32 EST 2012. Contains 205904 sequences.