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A366772
Sum of the divisors of A001045(n) (Jacobsthal numbers).
2
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
1,3
LINKS
FORMULA
a(n) = sigma(Jacobsthal(n)) = A000203(A001045(n)).
EXAMPLE
a(9) = 260 because Jacobsthal(9) = 171 has divisors {1, 3, 9, 19, 57, 171}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 21 2023
STATUS
approved