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 A324751 #6 Mar 16 2019 10:12:41 %S A324751 1,1,1,1,2,1,3,3,2,4,5,5,6,8,8,12,10,14,13,18,19,26,25,30,34,39,40,51, %T A324751 55,60,71,77,90,97,111,123,136,153,170,179,216,230,264,282,322,345, %U A324751 385,423,470,513,573,629,686,755,834,910,1005,1095,1194,1303,1433 %N A324751 Number of strict integer partitions of n containing no prime indices of the parts. %C A324751 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 A324751 The a(1) = 1 through a(13) = 8 strict integer partitions (A...D = 10...13): %e A324751 1 2 3 4 5 6 7 8 9 A B C D %e A324751 31 42 43 71 54 64 65 75 76 %e A324751 51 52 63 73 83 84 85 %e A324751 72 82 542 93 94 %e A324751 91 731 A2 B2 %e A324751 B1 643 %e A324751 751 %e A324751 931 %t A324751 Table[Length[Select[IntegerPartitions[n],UnsameQ@@#&&Intersection[#,PrimePi/@First/@Join@@FactorInteger/@#]=={}&]],{n,0,30}] %Y A324751 The subset version is A324741, with maximal case A324743. The non-strict version is A324756. The Heinz number version is A324758. An infinite version is A304360. %Y A324751 Cf. A000720, A001462, A007097, A074971, A078374, A112798, A276625, A290822, A305713, A306844, A324764. %Y A324751 Cf. A324695, A324742, A324748. %K A324751 nonn %O A324751 0,5 %A A324751 _Gus Wiseman_, Mar 16 2019