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Search: id:A151691
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| A151691 |
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G.f.: Prod_{ k >= 1 } (1 + 2*x^(2^k-1) + x^(2^k)). |
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+0
11
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| 1, 2, 1, 2, 5, 4, 1, 2, 5, 4, 5, 12, 13, 6, 1, 2, 5, 4, 5, 12, 13, 6, 5, 12, 13, 14, 29, 38, 25, 8, 1, 2, 5, 4, 5, 12, 13, 6, 5, 12, 13, 14, 29, 38, 25, 8, 5, 12, 13, 14, 29, 38, 25, 16, 29, 38, 41, 72, 105, 88, 41, 10, 1, 2, 5, 4, 5, 12, 13, 6, 5, 12, 13, 14, 29, 38, 25, 8, 5, 12, 13, 14, 29
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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Contribution from Omar E. Pol (info(AT)polprimos.com), Jun 09 2009: (Start)
Triangle begins:
1;
2,1;
2,5,4,1;
2,5,4,5,12,13,6,1;
2,5,4,5,12,13,6,5,12,13,14,29,38,25,8,1;
2,5,4,5,12,13,6,5,12,13,14,29,38,25,8,5,12,13,14,29,38,25,16,29,38,41,72,...
(End)
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CROSSREFS
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For generating functions of the form Prod_{k>=c} (1+a*x^(2^k-1)+b*x^2^k)) for the following values of (a,b,c) see: (1,1,0) A160573, (1,1,1) A151552, (1,1,2) A151692, (2,1,0) A151685, (2,1,1) A151691, (1,2,0) A151688 and A152980, (1,2,1) A151550, (2,2,0) A151693, (2,2,1) A151694
Cf. A151685. See A151703 for another version with a simpler recurrence.
Cf. A000079. [From Omar E. Pol (info(AT)polprimos.com), Jun 09 2009]
Sequence in context: A106480 A099602 A151703 this_sequence A104560 A121435 A137156
Adjacent sequences: A151688 A151689 A151690 this_sequence A151692 A151693 A151694
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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), Jun 04 2009
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