This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A237522 Numbers n such that phi(n) + sigma(n) = reversal(n) - 1. 4
 25, 165261124, 1698757933 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(4), if it exists, is larger than 10^13. LINKS 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 17 06:00 EDT 2019. Contains 327119 sequences. (Running on oeis4.)