A075803 Differences between adjacent palindromic squarefree numbers.

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

Offset

1,3

Links

Table of n, a(n) for n=1..70.

Example

a(1)=2-1=1, a(3)=5-3=2, a(6)=11-7=4.

Maple

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)];

Crossrefs

Cf. A037010.

Sequence in context: A265241 A166888 A083677 * A127966 A326570 A184880

Adjacent sequences: A075800 A075801 A075802 * A075804 A075805 A075806

Keyword

nonn,base

Author

Jani Melik, Oct 13 2002

Extensions

Edited by Dean Hickerson, Oct 21 2002

Status

approved