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 A274825 #83 Jan 07 2017 06:42:18 %S A274825 0,2,6,78,8640,1155000,82419540 %N A274825 Gaps associated with the arithmetic progressions in A278735. %C A274825 The first set of 4 prime-indexed primes in arithmetic progression (353, 431, 509, and 587) contains consecutive terms of A142160. %e A274825 a(4) = 78 because 353 = prime(prime(20)), 431 = prime(prime(23)), 509 = prime(prime(25)), 587 = prime(prime(28)), and 431-353 = 509-431 = 587-509 = 78. %e A274825 For the corresponding arithmetic progressions, see _Charles R Greathouse IV_'s example in A278735. - _Bobby Jacobs_, Jan 02 2017 %Y A274825 Cf. A006450, A093364, A142160, A278735, A279021, A279062. %K A274825 nonn,hard,more %O A274825 1,2 %A A274825 _Bobby Jacobs_, Dec 08 2016 %E A274825 a(7) from _Bobby Jacobs_, Jan 02 2017