A050938 Start of consecutive solutions of phi(x) = phi(x+2). That is, phi(a(n)) = phi(a(n)+2) and phi(a(n)+1) = phi(a(n)+3).

7, 359905, 5154625, 5886265, 2264566322, 7288270322, 7769878442, 13180385785, 189700037905, 196092541922, 466029676802, 524476614025, 593410971265, 753942150745, 760761410042, 1891149384842, 3432016687082, 4485159043225, 5563116250945, 6003635279425

Offset

1,1

Comments

a(11) <= 524476614025. - Donovan Johnson, Feb 04 2011

No other terms < 9.585 x 10^12 [ Jud McCranie, Sep 03 2013]

Links

Table of n, a(n) for n=1..20.

Example

phi(7) = phi(9) = 6 and phi(8) = phi(10) = 4, so 7 is in the sequence.

Crossrefs

Cf. A000010.

Sequence in context: A145335 A003835 A138878 * A246562 A008849 A358812

Adjacent sequences: A050935 A050936 A050937 * A050939 A050940 A050941

Keyword

nonn

Author

Jud McCranie, Jan 01 2000

Extensions

a(6)-a(10) from Donovan Johnson, Feb 04 2011

a(11)-a(15) from Jud McCranie, Jan 02 2013

a(16)-a(20) from Jud McCranie, Aug-Sep 2013

Status

approved