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A049228
sigma(n)-n is a perfect square associated with A049226.
3
25, 49, 1156, 2809, 1369, 169, 225, 3025, 4489, 5929, 441, 5329, 25281, 10609, 37249, 10609, 27889, 24649, 1225, 22801, 80089, 37249, 85849, 34225, 187489, 1849, 208849, 157609, 76729, 2401, 82369, 267289, 64009, 130321, 3771364, 555025, 966289, 310249, 344569
OFFSET
1,1
LINKS
FORMULA
a(n) = A000203(A049226(n)) - A049226(n). - Amiram Eldar, Aug 15 2019
EXAMPLE
a(27) = 208849 = 457^2 is a term since sigma(A049226(27)) - A049226(27) = 208849.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
EXTENSIONS
Offset corrected and more terms added by Amiram Eldar, Aug 15 2019
STATUS
approved