

A237522


Numbers n such that phi(n) + sigma(n) = reversal(n)  1.


4




OFFSET

1,1


COMMENTS

a(4), if it exists, is larger than 10^13.


LINKS

Table of n, a(n) for n=1..3.


EXAMPLE

n = 165261124 is a term, because phi(n) = 67233600, sigma(n) = 353928960 and 67233600 + 353928960 = 421162561  1, where 421162561 is the reversal of 165261124.


CROSSREFS

Cf. A070272, A230004, A230005, A230006, A230019, A136544, A237521.
Sequence in context: A228536 A191559 A279039 * A116197 A023924 A022066
Adjacent sequences: A237519 A237520 A237521 * A237523 A237524 A237525


KEYWORD

base,nonn,bref,more


AUTHOR

Giovanni Resta, Feb 08 2014


STATUS

approved



