A366772 Sum of the divisors of A001045(n) (Jacobsthal numbers).

1, 1, 4, 6, 12, 32, 44, 108, 260, 384, 684, 2688, 2732, 5632, 15936, 27864, 43692, 153920, 174764, 499968, 953920, 1477440, 2796204, 11708928, 12253248, 22380544, 69769600, 115568640, 181990200, 620101632, 715827884, 1826150832, 3880589184, 5726797824

Offset: 1

Author

Sean A. Irvine, Oct 21 2023

Keywords

• nonn

Examples

			a(9) = 260 because Jacobsthal(9) = 171 has divisors {1, 3, 9, 19, 57, 171}.
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..1122

Crossrefs

Cf. A000203, A001045, A366769, A366770, A366771, A063477.

Formula

a(n) = sigma(Jacobsthal(n)) = A000203(A001045(n)).