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Search: id:A047790
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| 0, 0, 0, 1, 6, 24, 81, 250, 732, 2073, 5742, 15664, 42273, 113202, 301428, 799273, 2112774, 5571816, 14668209, 38563882, 101285580, 265817145, 697214430, 1827923296, 4790749761, 12552714594, 32884171236, 86133353545, 225582998262
(list; graph; listen)
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OFFSET
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0,5
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MAPLE
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with(combstruct): SeqSeqSeqL := [T, {T=Sequence(S, card > 1), S=Sequence(U, card > 1), U=Sequence(Z, card >0)}, unlabeled]: seq(count(SeqSeqSeqL, size=j), j=1..29); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 16 2009]
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PROGRAM
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sage: [lucas_number1(n, 3, 1)-lucas_number1(n, 3, 2) for n in xrange(0, 30)] - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 06 2008
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CROSSREFS
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Sequence in context: A004404 A001788 A068711 this_sequence A133474 A052150 A118043
Adjacent sequences: A047787 A047788 A047789 this_sequence A047791 A047792 A047793
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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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