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 A144597 #10 Jun 05 2024 14:49:57 %S A144597 0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1, %T A144597 0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0, %U A144597 0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0 %N A144597 Christoffel word of slope 3/7. %C A144597 Periodic with period 10: repeat (0, 0, 0, 1, 0, 0, 1, 0, 0, 1). - _M. F. Hasler_, Oct 07 2016 %o A144597 (PARI) A144597(n)=(n%=10)&&!(n%3) \\ _M. F. Hasler_, Oct 07 2016 %Y A144597 See A144595 for further details. %Y A144597 Differs from A125117 from a(102) on. %K A144597 nonn %O A144597 0,1 %A A144597 _N. J. A. Sloane_, Jan 13 2009