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Search: id:A134072
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| A134072 |
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Concatenation of A000204 Lucas numbers (beginning at 1) in reverse order. |
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+0
3
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| 1, 31, 431, 7431, 117431, 18117431, 2918117431, 472918117431, 76472918117431, 12376472918117431, 19912376472918117431, 32219912376472918117431, 52132219912376472918117431, 84352132219912376472918117431
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Indices of prime terms are {2, 3, 5, 11, ...}. Primes are listed in A134071 = {31, 431, 117431, 19912376472918117431, ...}.
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LINKS
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Eric Weisstein, Link to a section of The World of Mathematics. Lucas Number
Eric Weisstein, Link to a section of The World of Mathematics. Smarandache Sequences.
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CROSSREFS
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Cf. A000204 = Lucas numbers. Cf. A130774 = Concatenate Lucas numbers. Cf. A019523 = Concatenate Fibonacci numbers. Cf. A038399 = Concatenate first n nonzero Fibonacci numbers in reverse order. Cf. A134069 = Primes in A038399. Cf. A134070 = Primes in A130774. Cf. A134071 = Primes in A134072.
Adjacent sequences: A134069 A134070 A134071 this_sequence A134073 A134074 A134075
Sequence in context: A068658 A068672 A089561 this_sequence A134071 A010836 A022723
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Oct 06 2007
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