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 A379066 #21 Feb 05 2025 14:33:07 %S A379066 0,4,9,20,31,42,60,81,100,121,147,183,210,241,272,307,342,400,441,484, %T A379066 529,576,651,703,757,813,871,931,1023,1059,1125,1190,1296,1369,1408, %U A379066 1520,1598,1681,1764,1849,1936,2070,2209,2302,2399,2500,2601,2707,2862,2972,3081,3192,3364,3481,3600,3721,3906,4033,4160,4291,4422,4560,4761,4900,5041,5256,5403,5550 %N A379066 Indices in A377091 where there is a record upward jump from a negative term to a positive term. %C A379066 These are the indices of record (positive) high points in A379061. %C A379066 The k-th high point corresponds to a jump in A379061 of height approximately k^2. These heights (whose square roots are 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, ...) do not warrant an OEIS entry of their own. %H A379066 Paolo Xausa, <a href="/A379066/b379066.txt">Table of n, a(n) for n = 1..888</a> (terms 1..130 from N. J. A. Sloane). %e A379066 The third term, 9, corresponds to the jump at the 9th term in A377091 from A377091(9) = -3 to A377091(10) = 6. (The fact that this is a jump of 9 = 3^2 is just a coincidence.) %e A379066 The fourth term, 20, corresponds to the jump of height 25 = 5^2 at the 20th term in A377091 from A377091(20) = -12 to A377091(21) = 13. %Y A379066 Cf. A377091, A379061, A379062. %Y A379066 See also A380837 and A380838. %K A379066 nonn %O A379066 1,2 %A A379066 _N. J. A. Sloane_, Dec 28 2024