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 A298041 #5 Oct 06 2023 12:01:49
%S A298041 1,5,25,49,89,129,189,245,325,397,497,585,705,809,949,1069,1229,1365,
%T A298041 1545,1697,1897,2065,2285,2469,2709,2909,3169,3385,3665,3897,4197,
%U A298041 4445,4765,5029,5369,5649,6009,6305,6685,6997,7397,7725,8145,8489,8929,9289,9749
%N A298041 Partial sums of A298040.
%t A298041 Accumulate[LinearRecurrence[{0,2,0,-1},{1,4,20,24,40,40},60]] (* _Harvey P. Dale_, Oct 06 2023 *)
%Y A298041 Cf. A298040.
%K A298041 nonn,more
%O A298041 0,2
%A A298041 _N. J. A. Sloane_, Jan 22 2018
%E A298041 More terms from _Harvey P. Dale_, Oct 06 2023