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A138827
Sum of digits of n-th even superperfect number A061652(n).
0
2, 4, 7, 10, 19, 25, 19, 37, 82, 115, 142, 172, 745, 856, 1603, 2980, 3079, 4240, 5812, 5842, 13165, 13480, 15136, 27052, 29455, 31339, 60112, 116386, 149239, 179821, 291511, 1025683, 1164760, 1703224, 1891861, 4038604, 4091767, 9440575, 18241120, 28450837, 32576617
OFFSET
1,1
COMMENTS
Also, sum of digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.
FORMULA
a(n) = A007953(A061652(n)). - Michel Marcus, Mar 15 2020
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Omar E. Pol, Apr 01 2008
EXTENSIONS
a(10)-a(33) from R. J. Mathar, May 22 2008
More terms from Jinyuan Wang, Mar 15 2020
STATUS
approved