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 A356347 #7 Nov 22 2022 22:20:13 %S A356347 4,17,38,41,48,56,57,75,104,109,112,120,131,162,166,186,189,196,201, %T A356347 220,241,273,274,293,341,360,389,421,428,466,467,510,522,555,601,607, %U A356347 623,631,635,669,684,685,704,711,712,735,763,793,815,823,824,831,832 %N A356347 Indices of the primes in A181424. %C A356347 This sequence, together with A358529 and A358531, partition the set of positive integers >= 3. %F A356347 a(n) = A064113(n) + 2. %e A356347 n 1 2 3 4 5 6 7 %e A356347 k 4 17 38 41 48 56 57 %e A356347 p(n) 7 59 163 179 223 263 269 %t A356347 t = Select[2 + Range[1440], %t A356347 Prime[#] - Prime[# - 1] == Prime[# - 1] - Prime[# - 2] &] (* A356347 *) %t A356347 Prime[t] (* A181424 *) %Y A356347 Cf. A064113, A358528, A358529, A358530, A358531, A181424. %K A356347 nonn,easy %O A356347 1,1 %A A356347 _Clark Kimberling_, Nov 21 2022