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 A155106 #15 Aug 31 2025 21:27:13 %S A155106 89,125,149,154,165,173,181,185,194,209,217,221,229,233,237,241,245, %T A155106 248,249,250,269,273,274,275,281,285,293,296,301,305,308,309,314,317, %U A155106 321,325,329,333,338,341,344,345,346,349,353,354,355,356,360,361,365,369,370,373,376,377,381,385,389,392 %N A155106 Numbers k such that both k and k+1 can be expressed as the sum of three distinct nonzero squares in 2 or more ways. %e A155106 Considering the term 149, 149 = 1^2+2^2+12^2 = 2^2+8^2+9^2 = 6^2+7^2+8^2 and 150 = 1^2+7^2+10^2 = 2^2+5^2+11^2. %Y A155106 Subset of A024804, any A024804(n) is contained in this sequence if A024804(n)+1 = A024804(n+1). %K A155106 nonn,changed %O A155106 1,1 %A A155106 Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 20 2009 %E A155106 Description clarified by _Harvey P. Dale_, Dec 13 2010