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 A371382 #21 Mar 21 2024 12:33:39
%S A371382 3,16,29,58,97,126,181,220,291,372,427,524,631,702,825,906,1045,1194,
%T A371382 1291,1456,1563,1744,1935,2058,2265,2482,2621,2854,3003,3252,3511,
%U A371382 3676,3951,4236,4417,4718,4909,5226,5553,5760,6103,6320,6679,7048,7281,7666,8061,8310
%N A371382 a(n) = n^2 + q*(q + 1), where q = floor(n*(1 + sqrt(5))/2) = A000201(n).
%H A371382 Paolo Xausa, <a href="/A371382/b371382.txt">Table of n, a(n) for n = 1..10000</a>
%t A371382 Array[#^2 + Block[{q = Floor[# * GoldenRatio]}, q * (q + 1)] &, 100]
%o A371382 (Python)
%o A371382 from math import isqrt
%o A371382 def A371382(n): return n**2+(q:=n+isqrt(5*n**2)>>1)*(q+1) # _Chai Wah Wu_, Mar 21 2024
%Y A371382 Main diagonal of A295573.
%Y A371382 Cf. A000201, A001622, A101332, A101863, A101867, A371381.
%K A371382 nonn,easy
%O A371382 1,1
%A A371382 _Paolo Xausa_, Mar 20 2024