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 A351721 #8 Feb 21 2022 02:30:20 %S A351721 607068,640618,665720,900921,1000880,1375940,1505878,1537250,1924224, %T A351721 1938508,1966338,2527998,3394224,3935424,4242624,4476624,4747224, %U A351721 4794624,5351367,5401824,5526024,5636356,5992298,6103900,6343298,7028362,7113024,8879424,8998262,9431424 %N A351721 Starts of runs of 3 consecutive lazy-Lucas-Niven numbers (A351719). %C A351721 Conjecture: There are no runs of 4 consecutive lazy-Lucas-Niven numbers (checked up to 3*10^9). %H A351721 Amiram Eldar, <a href="/A351721/b351721.txt">Table of n, a(n) for n = 1..5000</a> %e A351721 607068 is a term since 607068, 607069 and 607070 are all divisible by the number of terms in their maximal representation: %e A351721 k A130311(k) A131343(k) k/A131343(k) %e A351721 ------------------------------------------------------------- %e A351721 607068 111010101010101011110111101 18 33726 %e A351721 607069 111010101010101011110111111 19 31951 %e A351721 607070 111010101010101011111010110 17 35710 %Y A351721 Cf. A000032, A130311, A131343. %Y A351721 Subsequence of A351719 and A351720. %Y A351721 Similar sequences: A154701, A328206, A328210, A328214, A330932, A331087, A333428, A334310, A331822, A342428, A344343, A351716. %K A351721 nonn,base %O A351721 1,1 %A A351721 _Amiram Eldar_, Feb 17 2022