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 A378135 #22 Jan 08 2025 05:43:20 %S A378135 2,3,7,17,23,37,43,79,89,101,113,149,157,223,239,257,277,331,347,439, %T A378135 461,487,509,673,701,727,757,787,821,907,937,1151,1187,1223,1259,1297, %U A378135 1361,1523,1559,1601,1657,1777,1811,2027,2069,2129,2179,2503,2549,2609,2657 %N A378135 a(n) = p(n*p(n)), where p(x) = least prime > x. %F A378135 a(n) = A151800(n*A151800(n)). %e A378135 p(0) = 2, so a(0) = p(0*p(0)) = 2. %t A378135 Table[NextPrime[n*NextPrime[n]], {n, 1, 80}] %o A378135 (PARI) p(n) = nextprime(n+1); %o A378135 a(n) = p(n*p(n)); \\ _Michel Marcus_, Nov 21 2024 %Y A378135 Cf. A000040, A013636, A151800, A378136, A378137. %K A378135 nonn %O A378135 0,1 %A A378135 _Clark Kimberling_, Nov 20 2024