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Search: id:A020872
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| A020872 |
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Number of restricted forests in Moebius ladder M_n. |
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+0
1
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OFFSET
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2,1
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REFERENCES
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J. P. McSorley, Counting structures in the Moebius ladder, Discrete Math., 184 (1998), 137-164.
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FORMULA
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For large n, (4.8820)^n < a(n) < (6.4188)^n (Th. 10.1.) - C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 17 2005
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CROSSREFS
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Adjacent sequences: A020869 A020870 A020871 this_sequence A020873 A020874 A020875
Sequence in context: A050263 A020869 A055716 this_sequence A081219 A027006 A101092
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KEYWORD
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nonn,more,bref
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AUTHOR
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njas
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