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Search: id:A071067
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| A071067 |
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First highest palindromic prime pyramid with a(1)=2 such that (number of digits in a(n+1)) = (number of digits in a(n)) + 4. |
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1
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| 2, 70207, 357020753, 9635702075369, 33963570207536933, 723396357020753693327, 1272339635702075369332721, 97127233963570207536933272179, 119712723396357020753693327217911
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OFFSET
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1,1
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COMMENT
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There are 2 such highest "Palindromic prime pyramid" (beginning with 2) with 26 elements.
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REFERENCES
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G. L. Honaker Jr. and C. Caldwell, Palindromic prime pyramids.J.Recreational mathematics, vol. 30.3, pp. 169-176,1999-2000
J.-P. Delahaye, "Pour la science", (French edition of Scientific American), Juin 2002, p. 99
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CROSSREFS
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Cf. A070927, A070922.
Sequence in context: A051833 A060895 A100266 this_sequence A060069 A114950 A003840
Adjacent sequences: A071064 A071065 A071066 this_sequence A071068 A071069 A071070
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KEYWORD
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fini,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), May 26 2002
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