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 A382729 #6 Aug 10 2025 18:35:45
%S A382729 1,3,6,10,13,19,25,33,36,42,50,62,68,80,92,108,111,117,125,137,145,
%T A382729 161,177,201,207,219,235,259,271,295,319,351,354,360,368,380,388,404,
%U A382729 420,444,452,468,488,520,536,568,600,648,654,666,682,706,722,754,786,834,846,870,902,950,974,1022,1070,1134,1137,1143,1151
%N A382729 Total number of entries in rows 0,1,...,n of Pascal's triangle not divisible by 4.
%o A382729 (Python)
%o A382729 def A382729(n): return 1+sum(bin(m)[2:].count('10')+2<<m.bit_count()-1 for m in range(1,n+1)) # _Chai Wah Wu_, Aug 10 2025
%Y A382729 Cf. A001316, A006046-A006048, A194458, A194459, A382720-A382731.
%K A382729 nonn
%O A382729 0,2
%A A382729 _N. J. A. Sloane_, Apr 23 2025