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 A345422 #15 Jul 09 2025 04:56:03 %S A345422 1,-1,1,2,0,6,-3,7,-2,8,-14,-10,15,4,-17,-24,-16,-11,-6,13,20,36,-15, %T A345422 -8,-44,46,-28,39,10,-41,-23,12,25,38,-27,55,-57,-74,76,63,-65,33,-52, %U A345422 -35,18,-18,96,-81,62,-104,106,87,22,-114,-70,24,49,74,126,-51,103,80,28,-113,57 %N A345422 Row 5 of array in A345417. %o A345422 (Python) %o A345422 from sympy.core.numbers import igcdex %o A345422 from sympy import prime %o A345422 def A345422(n): return igcdex(11, prime(n))[0] # _Chai Wah Wu_, Jul 01 2021 %Y A345422 Cf. A345417-A345421. %K A345422 sign %O A345422 1,4 %A A345422 _N. J. A. Sloane_, Jun 19 2021