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 A347762 #7 Sep 12 2021 20:35:35 %S A347762 1,1,2,3,4,5,5,5,6,7,7,7,8,7,7,6,8,7,9,7,10,8,7,5,10,7,9,9,10,7,12,7, %T A347762 14,10,13,8,14,5,11,8,12,7,12,7,12,10,11,5,16,7,15,8,12,5,17,6,14,8, %U A347762 11,5,16,7,13,8,14,6,18,5,16,10,14 %N A347762 Number of compositions (ordered partitions) of n into at most 2 prime powers (including 1). %t A347762 Table[Length@Flatten[Permutations/@IntegerPartitions[n,2,Join[{1},Select[Range@n,PrimePowerQ]]],1],{n,0,70}] (* _Giorgos Kalogeropoulos_, Sep 12 2021 *) %Y A347762 Cf. A000961, A280543, A282062, A347763, A347764. %K A347762 nonn %O A347762 0,3 %A A347762 _Ilya Gutkovskiy_, Sep 12 2021