This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A300272 #8 Mar 03 2018 14:56:47
%S A300272 2,5,8,11,17,20,23,31,32,41,44,47,50,59,67,68,73,80,83,92,97,103,109,
%T A300272 110,124,125,127,128,137,149,157,164,167,170,176,179,188,191,197,200,
%U A300272 211,227,230,233,236,241,242,257,268,269,272,275,277,283,292,307,310
%N A300272 Sorted list of Heinz numbers of odd partitions.
%C A300272 An odd partition is an integer partition of an odd number into an odd number of parts, all of which are odd.
%C A300272 Any product of three members of this sequence is also in the sequence.
%e A300272 Sequence of odd partitions begins: (1), (3), (111), (5), (7), (311), (9), (11), (11111), (13), (511), (15), (331), (17), (19), (711), (21), (31111), (23), (911), (25), (27), (29), (531), (1111), (333), (31), (1111111).
%t A300272 primeMS[n_]:=If[n===1,{},Flatten[Cases[FactorInteger[n],{p_,k_}:>Table[PrimePi[p],{k}]]]];
%t A300272 Select[Range[100],OddQ[Total[primeMS[#]]]&&And@@OddQ/@primeMS[#]&]
%Y A300272 Cf. A000009, A031368, A066208, A078408, A094457, A215366, A299757, A300063.
%K A300272 nonn
%O A300272 1,1
%A A300272 _Gus Wiseman_, Mar 01 2018