A243462 Numbers n such that prime(n) and phi(n) have the same decimal digits.

51, 279, 326, 798, 810, 977, 1009, 1019, 1360, 1369, 1561, 1687, 1711, 1735, 1979, 2272, 2505, 2970, 3502, 4413, 4690, 5277, 5283, 5837, 6151, 6645, 6769, 6943, 7633, 8198, 8313, 8318, 10391, 10877, 11321, 15079, 16636, 17961, 18653, 18948, 19143, 20070

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Example

51 is in the sequence because prime(51) = 233 and phi(51) = 32.
20070 is in the sequence because prime(20070) = 225583 and phi(20070) = 5328.

Prog

(PARI) s=[]; for(n=1, 30000, if(vecsort(digits(prime(n)), , 8) == vecsort(digits(eulerphi(n)), , 8), s=concat(s, n))); s

Crossrefs

Cf. A000010, A000040, A243463.

Sequence in context: A204717 A253921 A204956 * A251351 A251344 A245362

Adjacent sequences: A243459 A243460 A243461 * A243463 A243464 A243465

Keyword

nonn,base

Author

Colin Barker, Jun 05 2014

Status

approved