%I #7 Aug 28 2017 01:02:44
%S 1,2,4,12,19,46,88,185,380,793,1589,3106,6078,12147,24534,49482,99792,
%T 201892,408478
%N a(n) = A289677(3*n+2).
%C No formulas or recurrences are known for the important sequences A289670 and A289671. The essence of these two sequences is captured in the six entries A290436-A290441. Any numerical properties of these would be most welcome.
%Y Cf. A284116, A284119, A284121, A289670-A289677, A290436-A290441.
%K nonn,more
%O 0,2
%A _N. J. A. Sloane_, Aug 02 2017
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