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Search: id:A006773
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| A006773 |
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Sum of squared spans of n-step polygons on square lattice.
(Formerly M3959)
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+0
1
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| 1, 5, 30, 186, 1164, 7344, 46732, 299604, 1932900, 12537542, 81705782, 534663812, 3511466838, 23136724382, 152888000934, 1012925595468, 6726766841438, 44767880394634
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A. J. Guttmann and I. G. Enting, The size and number of rings on the square lattice, J. Phys. A 21 (1988), L165-L172.
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CROSSREFS
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Sequence in context: A147837 A076036 A161407 this_sequence A059273 A038744 A098663
Adjacent sequences: A006770 A006771 A006772 this_sequence A006774 A006775 A006776
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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