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 A032778 #20 Jul 14 2018 02:34:20 %S A032778 0,1,4,7,9,14,19,21,28,34,49,70,84,109,119,154,217,259,364,609,784, %T A032778 1099,1834,5509 %N A032778 Numbers k such that k*(k+1)*(k+2)*...*(k+7) / (k+(k+1)+(k+2)+...+(k+7)) is an integer. %C A032778 (d-7)/2 where d >= 7 is a divisor of 11025, so sequence is finite. - _Robert Israel_, Jul 12 2018 %t A032778 Select[Range[0, 300], IntegerQ[Times@@Range[#, # + 7] / Total[Range[#, # + 7]]] &] (* _Vincenzo Librandi_, Jul 13 2018 *) %Y A032778 Cf. A032777, A032779. %K A032778 nonn,fini,full %O A032778 1,3 %A A032778 _Patrick De Geest_, May 15 1998 %E A032778 Offset changed by _Robert Israel_, Jul 12 2018