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 A162957 #10 Jul 21 2025 06:07:29 %S A162957 1,4,7,13,7,19,34,40,7,19,34,46,40,91,142,121,7,19,34,46,40,91,142, %T A162957 127,40,91,148,178,211,415,547,364,7,19,34,46,40,91,142,127,40,91,148, %U A162957 178,211,415,547,370,40,91,148,178,211,415,553,421,211,421,622,745,1048,1792,2005,1093 %N A162957 A162956 convolved with (1, 3, 0, 0, 0, ...). %C A162957 Rows of A162956 tend to this sequence. Analogous to rows of A160552 tending to A151548. %F A162957 Equals (1, 3, 0, 0, 0, ...) * (1, 1, 4, 1, 4, 7, 13, 1, 4, 7, 13, 7, 19, 34, 40, ...). %Y A162957 Cf. A162956, A162958. %K A162957 nonn %O A162957 1,2 %A A162957 _Gary W. Adamson_, Jul 18 2009 %E A162957 a(20), a(21) corrected and more terms from _Georg Fischer_, Jul 17 2025