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A350575

Squarefree numbers k such that k + (k reversed) is also squarefree.

1, 3, 5, 7, 10, 11, 14, 15, 19, 21, 23, 30, 33, 34, 37, 41, 42, 43, 46, 51, 55, 58, 59, 61, 67, 69, 70, 73, 77, 78, 82, 85, 86, 87, 89, 91, 94, 95, 101, 102, 105, 106, 109, 111, 115, 118, 119, 130, 131, 134, 138, 139, 141, 142, 146, 149, 151, 155, 158, 159, 161, 166, 170, 174, 178, 181, 182, 185, 190, 191, 194, 195, 199

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OFFSET

1,2

COMMENTS

This is to squarefree numbers what A061783 is to primes.

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

14 is a term since it's squarefree and so is 14 + 41 = 55.

MAPLE

R:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||n):

q:= n-> andmap(numtheory[issqrfree], [n, n+R(n)]):