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A052798
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A simple grammar.
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0
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1, 1, 5, 40, 355, 3475, 35836, 384436, 4243860, 47905385, 550404336, 6415528666, 75677788275, 901728156490, 10837196405920, 131215506276862, 1599078373019073, 19598996116313001, 241433496694878595
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 755
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MAPLE
| spec := [S, {S=PowerSet(B), B=Prod(Z, S, S, S, S, S)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
| Sequence in context: A078846 A027259 A007036 * A137973 A052788 A130564
Adjacent sequences: A052795 A052796 A052797 * A052799 A052800 A052801
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KEYWORD
| easy,nonn
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AUTHOR
| encyclopedia(AT)pommard.inria.fr, Jan 25 2000
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