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 A324750 #7 Mar 16 2019 10:12:33 %S A324750 1,0,1,1,1,1,2,3,2,4,4,4,6,8,8,11,10,15,16,19,23,27,28,35,39,47,50,63, %T A324750 68,77,91,102,114,130,147,169,187,213,237,268,300,336,380,422,472,525, %U A324750 587,647,731,810,895,996,1102,1227,1355,1498,1661,1818,2020,2221 %N A324750 Number of strict integer partitions of n not containing 1 or any part whose prime indices all belong to the partition. %C A324750 A prime index of n is a number m such that prime(m) divides n. The multiset of prime indices of n is row n of A112798. %e A324750 The a(2) = 1 through a(17) = 15 strict integer partitions (A...H = 10...17): %e A324750 2 3 4 5 6 7 8 9 A B C D E F G H %e A324750 42 43 62 54 64 65 75 76 86 87 97 98 %e A324750 52 63 73 83 84 85 95 96 A6 A7 %e A324750 72 82 542 93 94 A4 A5 C4 B6 %e A324750 A2 A3 B3 B4 D3 C5 %e A324750 642 B2 C2 C3 E2 D4 %e A324750 643 752 D2 763 E3 %e A324750 652 842 654 862 F2 %e A324750 762 943 854 %e A324750 843 A42 863 %e A324750 852 872 %e A324750 A43 %e A324750 A52 %e A324750 B42 %e A324750 6542 %t A324750 Table[Length[Select[IntegerPartitions[n],UnsameQ@@#&&!MemberQ[#,1]&&!MemberQ[#,k_/;SubsetQ[#,PrimePi/@First/@FactorInteger[k]]]&]],{n,0,30}] %Y A324750 The subset version is A324739. The non-strict version is A324755. The Heinz number version is A324760. An infinite version is A324694. %Y A324750 Cf. A000720, A001462, A007097, A074971, A078374, A112798, A276625, A290822, A304360, A305713, A306844. %Y A324750 Cf. A324696, A324737, A324742, A324744, A324764. %K A324750 nonn %O A324750 0,7 %A A324750 _Gus Wiseman_, Mar 15 2019