A161338 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A161338

a(n) = (A161330(n+1) - 2)/2.

%I #6 Jul 31 2021 01:59:34

%S 0,3,6,9,18,21,30,39,48,63,72,87,108,111,120,129,144,171,186,225,246,

%T 273,312,333,366,405,414,435,456,483,528,561,624,669,714,765,798,837,

%U 882,927,972,999,1032,1089,1128,1191,1254,1305,1356,1425,1476,1557,1608

%N a(n) = (A161330(n+1) - 2)/2.

%Y Cf. A161330, A161331, A161336, A161337.

%K nonn

%O 0,2

%A _Omar E. Pol_, Jun 09 2009

%E More terms from _Jinyuan Wang_, Jul 30 2021