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%I #7 Sep 03 2020 15:49:24
%S 3,3,6,9,12,15,21,24,30,36,42,48,57,63,72,81,90,99,111,120,132,144,
%T 156,168,183,195,210,225,240,255,273,288,306,324,342,360,381,399,420,
%U 441,462,483,507,528,552,576,600,624,651,675,702,729,756,783,813,840,870
%N a(n) = 3*A001399(n).
%Y Cf. A001399.
%K nonn,easy,less
%O 0,1
%A _Thomas Wieder_, Feb 11 2007
%E More terms from _Robert G. Wilson v_, Feb 11 2007
%E Offset corrected by _Alois P. Heinz_, Sep 02 2020
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