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a(n) = A154796(n)/2.
1

%I #10 Dec 17 2016 17:39:26

%S 15,28,88,245,396,979,1505,3421,44567,62377,225638,307077,415910,

%T 1006279,4059132,6924325,66615465,107240563,135624475,270973120,

%U 425688314,663855038,1581563676,2417635935,2982269752,3673314756,4517918038,5548822508,8335344604,15194335989

%N a(n) = A154796(n)/2.

%H G. C. Greubel, <a href="/A163286/b163286.txt">Table of n, a(n) for n = 1..1000</a>

%t (1/2)*Reap[Do[If[EvenQ[p = PartitionsP[n]], Sow[p]], {n, 1, 500, 2}]][[2, 1]] }] (* _G. C. Greubel_, Dec 17 2016 *)

%o (PARI) lista(nn) = for (n=1, nn, if (((p = numbpart(2*n+1)) % 2) == 0, print1(p/2, ", "))); \\ _Michel Marcus_, Dec 17 2016

%Y Cf. A000041, A154796, A163096.

%K nonn

%O 1,1

%A _Omar E. Pol_, Aug 09 2009

%E More terms from _R. J. Mathar_, Sep 27 2009