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 A286636 #29 Sep 17 2024 10:16:23 %S A286636 2,6,10,14,18,26,30,38,42,46,50,54,62,66,74,82,86,90,98,102,110,114, %T A286636 118,122,126,138,146,150,154,158,170,174,182,186,194,198,206,222,226, %U A286636 230,234,242,246,258,262,266,270,278,282,290,294,306,314,318,326,334,338,350,354,362,366,370,374,378,390,398 %N A286636 Even numbers that are a sum of two squares plus 1. %C A286636 The first 13 terms coincide with A000952. %C A286636 If the conjecture in A000952 is true, the two sequences are the same. - _R. J. Mathar_, May 18 2017 %C A286636 Numbers that are the sum of two centered square numbers (A001844). - _Ilya Gutkovskiy_, Jun 03 2017 %t A286636 Select[Range[2, 400, 2], SquaresR[2, # - 1] != 0 &] %Y A286636 Cf. A000952, A001481, A166687. %K A286636 nonn %O A286636 1,1 %A A286636 _Jean-François Alcover_, May 11 2017