|
|
A181637
|
|
Numbers n such that lambda(n) = reversal(n).
|
|
0
|
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
Lambda(n) is the Carmichael lambda function A002322.
|
|
LINKS
|
|
|
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
|
|
|
KEYWORD
|
nonn,base,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|