A342835 a(n) is the number of divisors of A342834(n).

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

Offset

1,1

Comments

a(21) = 96, a(63) = 4. - Chai Wah Wu, Mar 26 2021

Links

Table of n, a(n) for n=1..19.

Formula

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

Example

a(1) = a(2) = 2 because A342834(1) = 7 and A342834(2) = 797 are primes.
a(4) = 16 because A342834(4) = 7979979973 = 7 * 23 * 137 * 361789.

Crossrefs

Cf. A000005, A342834, A342836.

Sequence in context: A295193 A248097 A098273 * A361294 A220172 A276054

Adjacent sequences: A342832 A342833 A342834 * A342836 A342837 A342838

Keyword

nonn,base,hard,more

Author

Bernard Schott, Mar 23 2021

Extensions

a(3)-a(11) from Michel Marcus, Mar 23 2021

a(12)-a(14) from Daniel Suteu, Mar 23 2021

a(15)-a(18) from Michael S. Branicky and Apurva Rai, Mar 26 2021

a(19) from Sean A. Irvine, May 01 2023

Status

approved