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Search: id:A075801
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| A075801 |
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Differences between adjacent palindromic nonprime numbers A032350. |
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+0
1
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| 3, 2, 2, 1, 13, 11, 11, 11, 11, 11, 11, 11, 12, 10, 20, 20, 10, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 20, 10, 10, 20, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 10, 20, 10, 20, 10, 31
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(1)=4-1=3, a(5)=22-9=13.
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MAPLE
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test := proc(n) local d; d := convert(n, base, 10); return ListTools[Reverse](d)=d and not isprime(n); end; s := []; for n from 1 to 1000 do if test(n) then s := [op(s), n]; end; od; a := [op(2..-1, s)-op(1..-2, s)];
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CROSSREFS
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Cf. A037010, A032350.
Sequence in context: A130195 A071048 A098054 this_sequence A116943 A075791 A104435
Adjacent sequences: A075798 A075799 A075800 this_sequence A075802 A075803 A075804
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KEYWORD
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nonn,base
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AUTHOR
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Jani Melik (jani_melik(AT)hotmail.com), Oct 13 2002
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EXTENSIONS
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Edited by Dean Hickerson (dean(AT)math.ucdavis.edu), Oct 21 2002
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