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 A193143 #21 Dec 09 2013 09:03:13 %S A193143 103,127,139,151,163,167,179,191,199,211,223,227,229,239,241,251,263, %T A193143 271,277,281,283,307,311,313,331,337,347,349,353,359,367,373,379,383, %U A193143 389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,491 %N A193143 Primes which are the sum of 5 distinct positive squares in more than one way. %C A193143 All terms from 103 onwards in A068229 are primes which are the sum of 5 distinct positive squares in more than one way. %e A193143 103 = 1^2 + 2^2 + 3^2 + 5^2 + 8^2 = 2^2 + 3^2 + 4^2 + 5^2 + 7^2. %e A193143 127 = 1^2 + 2^2 + 3^2 + 7^2 + 8^2 = 1^2 + 4^2 + 5^2 + 6^2 + 7^2 = 1^2 + 2^2 + 4^2 + 5^2 + 9^2. %t A193143 sum5sqP = {}; Do[Do[Do[Do[Do[p = a^2 + b^2 + c^2 + d^2 + e^2; If[PrimeQ[p], AppendTo[sum5sqP, p]], {e, d - 1, 1, -1}], {d, c - 1, 1, -1}], {c, b - 1, 1, -1}], {b, a - 1, 1, -1}], {a, 6, 30}]; a = Take[Sort[sum5sqP], 1000]; a = Select[Table[If[a[[n]] == a[[n - 1]] && a[[n]] != a[[n - 2]], a[[n]], ""], {n, 3, Length[a]}], IntegerQ] %Y A193143 Cf. A068229, A085317, A193141, A193142. %K A193143 nonn %O A193143 1,1 %A A193143 _Vladimir Joseph Stephan Orlovsky_, Jul 16 2011