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 A380837 #10 May 24 2025 01:14:41
%S A380837 4,9,20,31,42,60,81,100,121,147,183,210,241,272,307,342,400,441,484,
%T A380837 529,576,651,703,757,813,871,931,965,1023,1059,1089,1125,1190,1228,
%U A380837 1296,1369,1408,1448,1520,1525,1598,1603,1681,1764,1849,1936,2070,2117,2209,2302
%N A380837 Sequence Sg of the eight sequences defining the blocks of terms in A377091.
%C A380837 See the comments in A379788 (Sequence Sa) for further information.
%C A380837 Apart from A379066(1) = 0, the beginning of this sequence coincides with A379066 up to a(27) = A379066(28). a(28) = 965 is the first term not present in A379066 (cf. A380838).
%H A380837 Paolo Xausa, <a href="/A380837/b380837.txt">Table of n, a(n) for n = 1..1000</a>
%F A380837 a(n) = A379788(n+1) - 1.
%t A380837 SequencePosition[A377091list[5000], {_?Negative, _?Positive}][[All, 1]] - 1
%Y A380837 Cf. A377091, A379066, A379788, A379789, A379790, A379791, A379792, A379793, A379794, A380838.
%K A380837 nonn
%O A380837 1,1
%A A380837 _Paolo Xausa_, Feb 05 2025