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Search: id:A075803
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| A075803 |
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Differences between adjacent palindromic squarefree numbers. |
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+0
1
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| 1, 1, 2, 1, 1, 4, 11, 11, 22, 11, 11, 24, 10, 20, 10, 10, 10, 20, 10, 11, 20, 40, 20, 21, 10, 10, 30, 20, 10, 10, 41, 20, 20, 20, 11, 10, 20, 10, 10, 10, 30, 11, 20, 20, 61, 10, 10, 10, 20, 10, 10, 10, 10, 21, 20, 20, 20, 20, 21, 10, 10, 10, 10, 10, 10, 10, 12, 110, 110, 220
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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a(1)=2-1=1, a(3)=5-3=2, a(6)=11-7=4.
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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 numtheory[mobius](n)<>0; end; s := []; for n from 1 to 1500 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.
Sequence in context: A051292 A094424 A083677 this_sequence A127966 A110243 A088347
Adjacent sequences: A075800 A075801 A075802 this_sequence A075804 A075805 A075806
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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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