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 A241859 #15 May 10 2014 13:41:10 %S A241859 5,7,13,31,19,41,31,61,59,71,43,71,101,61,101,73,113,103,151,131,103, %T A241859 109,191,131,167,211,151,151,139,241,167,191,151,227,271,199,191,181, %U A241859 311,269,193,167,433,199,211,269,311,293,281,229,191,263,401,241,251 %N A241859 1st Arithmetic derivative of numbers with prime arithmetic derivative (A157037). %C A241859 The arithmetic derivative of numbers with prime arithmetic derivative (A157037) leads to a sequence of a selection of prime numbers. It is possible for several numbers to produce the same primes (see A189441). The next arithmetic derivative is A000012, the simplest sequence of positive numbers: the all 1's sequence, A000012=(A157037)’’. %C A241859 For the arithmetic derivative of n see A003415. - _Wolfdieter Lang_, May 10 2014 %H A241859 Freimut Marschner, <a href="/A241859/b241859.txt">Table of n, a(n) for n = 1..1000</a> %F A241859 a(n) = (A157037(n))’. %F A241859 a(n) = A003415(A157037(n)). %e A241859 a(10) = (A157037(10))'= (78)' = (2*3*13)' = 2*3+3*13+2*13 = 71, %e A241859 a(12) = (A157037(12))'= (105)' = (3*5*7)' = 3*5+5*7+3*7 = 71. %Y A241859 Cf. A157037, A003415, A189441. %K A241859 nonn %O A241859 1,1 %A A241859 _Freimut Marschner_, Apr 30 2014