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 A375765 #12 Sep 03 2024 01:36:44 %S A375765 2,2,3,2,11,7,2,23,7,167,2,7,151,5,941,2,139,479,1901,1019,6299,2,23, %T A375765 8543,467,12823,1013,6287,2,293,151,123239,463,102811,4391,150287,2, %U A375765 89,23929,251,2350349,15667,369991,8849,866087,2,523,1823,370247,1747,24370007 %N A375765 Square array read by antidiagonals in ascending order T(n,k), n > 1 and k > 0, representing the least prime p that starts a run of exactly k consecutive primes, all having the same sum of digits in base n > 1, or -1 if no such number exists. %e A375765 T(2,3) = 7, because the 3 consecutive primes 7 = 111_2, 11 = 1011 and 13 = 1101_2 have all the same sum of digits in base 2, and no lesser number has this property. %e A375765 The upper left square of the table begins at T(2,1): %e A375765 2 3 7 167 941 6299 ... %e A375765 2 11 7 5 1019 1013 ... %e A375765 2 23 151 1901 12823 102811 ... %e A375765 2 7 479 467 463 15667 ... %e A375765 2 139 8543 123239 2350349 24370007 ... %e A375765 2 23 151 251 1747 1741 ... %e A375765 ... ... ... ... ... ... ... %Y A375765 Cf. A071613. %K A375765 nonn,base,tabl %O A375765 2,1 %A A375765 _Jean-Marc Rebert_, Aug 27 2024