0,2
Conjecture: for n>1 this is A050804.
Conjecture: sequence consists of numbers of form 2*k^2 such that sigma(2*k^2)==3 (mod 4) and k is not divisible by 5.
Cf. A050804.
Adjacent sequences: A081321 A081322 A081323 this_sequence A081325 A081326 A081327
Sequence in context: A074629 A001105 A051787 this_sequence A050804 A018229 A072779
nonn
Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 20 2003
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