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

Author

Jani Melik, Oct 13 2002

Keywords

• nonn
• base

Examples

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

Crossrefs

Cf. A037010.

First differences of A071251.

Programs

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)];

Extensions

Edited by Dean Hickerson, Oct 21 2002