A070246 - OEIS

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A070246

a(n) = lcm(n, R(n)) / gcd(n, R(n)), where R(n) (A004086) is the digit reversal of n.

1, 1, 1, 1, 1, 1, 1, 1, 1, 10, 1, 28, 403, 574, 85, 976, 1207, 18, 1729, 10, 28, 1, 736, 28, 1300, 403, 24, 574, 2668, 10, 403, 736, 1, 1462, 1855, 28, 2701, 3154, 403, 10, 574, 28, 1462, 1, 30, 736, 3478, 28, 4606, 10, 85, 1300, 1855, 30, 1, 3640, 475, 4930, 5605

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OFFSET

1,10

COMMENTS

a(1) = 1, a(18) = 18. Are there more terms for which a(k) = k?

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

a(12) = lcm(12,21)/gcd(12,21) = 84/3 = 28.

MATHEMATICA

r[n_] := FromDigits[ Reverse[ IntegerDigits[n]]]; Table[ LCM[n, r[n]] / GCD[n, r[n]], {n, 1, 65}]

CROSSREFS