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 A120426 #17 Feb 16 2025 08:33:01 %S A120426 1,3,5,49,11,22,17,6859,529,35,31,76,41,51,55,7890481,59,124,67,148, %T A120426 74,77,83,472,9409,87,1092727,212,109,285,127,38579489651,115,118,119, %U A120426 14884,157,129,133,856,179,385,191,356,363,155,211,2512,51529,412,177,425 %N A120426 n-th number with the same prime signature as n. %H A120426 David A. Corneth, <a href="/A120426/b120426.txt">Table of n, a(n) for n = 1..20000</a> %H A120426 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PrimeSignature.html">Prime Signature</a> %F A120426 If p is prime, a(p) = prime(p). a(p^k) = prime(p^k)^k. More generally, if n = m^k, a(n) = [n-th number whose prime signature is the same as m]^k. %Y A120426 Cf. A000040, A006450, A046523, A118914. %K A120426 nonn %O A120426 1,2 %A A120426 _Franklin T. Adams-Watters_, Jul 12 2006