A342835 - OEIS

%I #32 May 01 2023 15:42:30

%S 2,2,8,16,8,4,64,4,32,8,128,64,16,64,512,8,8,64,64

%N a(n) is the number of divisors of A342834(n).

%C a(21) = 96, a(63) = 4. - _Chai Wah Wu_, Mar 26 2021

%F a(n) = A000005(A342834(n)).

%e a(1) = a(2) = 2 because A342834(1) = 7 and A342834(2) = 797 are primes.

%e a(4) = 16 because A342834(4) = 7979979973 = 7 * 23 * 137 * 361789.

%Y Cf. A000005, A342834, A342836.

%K nonn,base,hard,more

%O 1,1

%A _Bernard Schott_, Mar 23 2021

%E a(3)-a(11) from _Michel Marcus_, Mar 23 2021

%E a(12)-a(14) from _Daniel Suteu_, Mar 23 2021

%E a(15)-a(18) from _Michael S. Branicky_ and _Apurva Rai_, Mar 26 2021

%E a(19) from _Sean A. Irvine_, May 01 2023