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 A338424 #7 Aug 20 2021 03:36:24 %S A338424 1,2,13,250,8961,821848,90031117,16929468082,3699112438993, %T A338424 1172372082948016,592930150554224105,314980461163972949868, %U A338424 237098727748233796765441,209617206588771062279193558,193794661072190257001413994605,210096924743130844484817519143524,287845708921326527700201694718406369 %N A338424 Permanent of n X n matrix whose rows are cyclic permutations of 2..prime(n). %H A338424 Vaclav Kotesovec, <a href="/A338424/b338424.txt">Table of n, a(n) for n = 0..36</a> %e A338424 a(3) = 250 because the permanent of [(2,3,5), (3,5,2), (5,2,3)] is 250. %o A338424 (PARI) a(n) = matpermanent(matrix(n, n, i, j, prime((i+j-2) % n + 1))) %Y A338424 Cf. A000040, A052182, A066933, A070896, A086759. %K A338424 nonn %O A338424 0,2 %A A338424 _Stefano Spezia_, Oct 25 2020