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A138871
Last 3 digits of n-th even superperfect number A061652(n).
2
2, 4, 16, 64, 96, 536, 144, 824, 976, 56, 64, 864, 576, 64, 544, 504, 176, 536, 496, 304, 56, 776, 96, 736, 376, 256, 336, 104, 504, 656, 224, 944, 296, 264, 856, 576, 136, 896, 536, 24, 704, 624, 936, 936, 464, 376, 256, 976
OFFSET
1,1
COMMENTS
Also, last 3 digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.
FORMULA
a(n) = 2^(A000043(n)-1) mod 1000. - Max Alekseyev, Feb 16 2024
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Omar E. Pol, Apr 02 2008
EXTENSIONS
More terms from R. J. Mathar, Feb 05 2010
a(40)-a(41) from Max Alekseyev, Feb 11 2012
a(42)-a(47) from Jinyuan Wang, Mar 14 2020
a(48) from Max Alekseyev, Feb 16 2024
STATUS
approved