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Search: id:A081941
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| A081941 |
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a(1) = 1; for n>1, a(n)= smallest number greater than the previous term such that a(n-1)*a(n) + 1 is a palindrome. |
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+0
2
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| 1, 2, 3, 7, 14, 23, 32, 45, 153, 167, 352, 3610, 4977, 11332, 27866, 46955, 275824, 508960, 1978100, 5211763, 22579170, 50936903, 98746668, 103408400, 105030502, 106085805, 115059404, 458335581, 2483842510, 4847757902, 6623606611
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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3 is followed by 7 because 3*4+1, 3*5+1, and 3*6+1 aren't palindromes, but 3*7+1 = 22 is.
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CROSSREFS
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Cf. A082270.
Sequence in context: A081940 A082270 A055688 this_sequence A027957 A054194 A138651
Adjacent sequences: A081938 A081939 A081940 this_sequence A081942 A081943 A081944
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 02 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jul 16 2004
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