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 A181321 #29 Mar 16 2022 16:39:15 %S A181321 189997999,199799989,199898899,199997899,199997989,199998889, %T A181321 268999999,269998999,278989999,278999989,279889999,279988999, %U A181321 287998999,287999989,288998989,288999889,288999979,289699999,289789999,289889989 %N A181321 Primes with digital sum 70. %C A181321 The sequence begins with 8438 9-digit numbers. %C A181321 Then there are 739572 10-digit numbers. %C A181321 All terms == 7 (mod 18). %H A181321 T. D. Noe, <a href="/A181321/b181321.txt">Table of n, a(n) for n = 1..8438</a> %t A181321 Select[Prime[Range[3*10^8]], Total[IntegerDigits[#]]==70 &] (* _Vincenzo Librandi_, Jul 09 2014 *) %o A181321 (Magma) [p: p in PrimesUpTo(3*10^8) | &+Intseq(p) eq 70]; // _Vincenzo Librandi_, Jul 09 2014 %o A181321 (Python) # see code in A107579 which can be used to produce this sequence by giving the initial term p = 189997999 (or 8*10**7-1, for digit sum 70). - _M. F. Hasler_, Mar 16 2022 %Y A181321 Cf. A073867, A111380, A181178, A181182. %Y A181321 Cf. similar sequences listed in A244918. %K A181321 nonn,base %O A181321 1,1 %A A181321 _Zak Seidov_, Jan 26 2011