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A181637
Numbers n such that lambda(n) = reversal(n).
0
1, 40, 210, 8656341, 86563410
OFFSET
1,2
COMMENTS
Lambda(n) is the Carmichael lambda function A002322.
EXAMPLE
210 is in the sequence because lambda(210)= reversal(210) = 12.
MATHEMATICA
Do[If[CarmichaelLambda [n] == FromDigits[Reverse[IntegerDigits[n]]], Print[n]], {n, 1, 10^8}]
PROG
(PARI) isok(n) = lcm(znstar(n)[2]) == subst(Polrev(digits(n)), x, 10); \\ Michel Marcus, Mar 18 2016
CROSSREFS
Sequence in context: A077818 A247405 A235270 * A111176 A072108 A218404
KEYWORD
nonn,base,more
AUTHOR
Michel Lagneau, Nov 18 2010
STATUS
approved