A130134 Even terms in A015922.

2, 4, 8, 248, 17608, 90148, 106978, 253828, 364808, 1642798, 1926088, 6176264, 21879938, 30484408, 34634428, 96593698, 134396408, 223622468, 283585928, 327327388, 457961188, 809965148, 1709420344, 1815124028, 2164392968, 2360006456, 2431619908, 2500777828, 2922255548, 3888155428, 5672481928

Offset: 1

Author

Zak Seidov, May 12 2007

Keywords

• nonn

Comments

Also, the even terms of A033554.

Links

• Max Alekseyev, Table of n, a(n) for n = 1..314 (all terms below 10^15)

Crossrefs

Cf. A015922, A130133.

Programs

PARI

isok(n) = !(n % 2) && (Mod(2^n, n) == Mod(8, n)); \\ Michel Marcus, Oct 13 2013

Extensions

a(8)-a(9) from Michel Marcus, Oct 13 2013

Terms a(10) onward from Max Alekseyev, Oct 11 2016