4,2
Seems to be n*A006918.
Adjacent sequences: A050186 A050187 A050188 this_sequence A050190 A050191 A050192
Sequence in context: A038606 A066280 A136113 this_sequence A116995 A032281 A077918
nonn
Clark Kimberling (ck6(AT)evansville.edu)
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