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 A108880 #12 Feb 16 2025 08:32:58 %S A108880 8018018851,8000000018,8,8018000018,8018018886,8018018085,8018018808, %T A108880 8000000008,8018018000,8018018048,8018018816,8018018176,8018808000, %U A108880 8018808832,8018000000,8018018304,8018887680,8018804736,8018853888 %N A108880 Alphabetically earliest number that is a product of exactly n primes. %C A108880 Conway and Guy note that 8018018851 is, alphabetically, the first prime number in the American system of large number terminology and term this "Knuth's number." We have "eight billion" alphabetically before "eighteen" or "eighty." %D A108880 Conway, J. H. and Guy, R. K. The Book of Numbers. New York: Springer-Verlag, p. 15, 1996. %H A108880 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/AlmostPrime.html">Almost Prime</a>. %e A108880 n Alphabetically first n-almost prime %e A108880 1 8018018851 %e A108880 2 8000000018 = 2 * 4000000009 %e A108880 3 8 = 2^3 %e A108880 4 8018000018 = 2 * 7 * 97 * 5904271 %e A108880 5 8018018886 = 2 * 3 * 19 * 6661 * 10559 %e A108880 6 8018018085 = 3 * 5 * 7 * 11 * 163 * 42589 %e A108880 7 8018018808 = 2^3 * 3 * 31 * 2161 * 4987 %e A108880 8 8000000008 = 2^3 * 7 * 11 * 13 * 19 * 52579 %e A108880 9 8018018000 = 2^4 * 5^3 * 127 * 31567 %e A108880 10 8018018048 = 2^8 * 43 * 728381 %Y A108880 Cf. A000052. %K A108880 nonn,word %O A108880 1,1 %A A108880 _Jonathan Vos Post_, Jul 14 2005 %E A108880 Corrected and extended by _Ray Chandler_, Jul 25 2005 %E A108880 Definition clarified by _N. J. A. Sloane_, Sep 27 2011