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 A249989 #12 Jan 16 2015 10:21:32 %S A249989 10,20,27,34,52,68,74,84,100,130,164,165,195,202,244,290,328,340,378, %T A249989 390,394,452,514,580,650,651,724,802,884,903,970,1028,1032,1060,1154, %U A249989 1220,1252,1354,1460,1539,1570,1684,1802,1924,2050,2056 %N A249989 Numbers representable as x^y * y + y, where x>1 and y>1 are integers. %C A249989 The sequence of numbers z such that both z and z+1 are in the sequence begins: %C A249989 164, 650, 5187, 41474, 472394, 2654210, 10125002, 21233667, 30233090, 76236554, 169869314, 344373770, 648000002 %e A249989 a(1) = 10 = 2^2 * 2 + 2. %e A249989 a(2) = 20 = 3^2 * 2 + 2. %e A249989 a(3) = 27 = 2^3 * 3 + 3. %e A249989 a(9) = 100 = 7^2 * 2 + 2. %e A249989 a(11) = 164 = 9^2 * 2 + 2. %e A249989 a(12) = 165 = 2^5 * 5 + 5. %K A249989 nonn %O A249989 1,1 %A A249989 _Alex Ratushnyak_, Jan 11 2015