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 A306720 #19 Mar 11 2019 10:28:07 %S A306720 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48, %T A306720 50,52,54,56,58,62,64,66,68,70,74,76,78,80,82,86,88,90,92,94,98,102, %U A306720 104,106,110,114,116,118,122,124,126,128,130,134,138,142,146,150 %N A306720 Even numbers that are not the sum of two unitary abundant numbers (not necessarily distinct). %C A306720 The unitary version of A048242. %C A306720 a(6066) = 530086 is the last term. te Riele proved that every even number larger than 530086 is the sum of two unitary abundant numbers (not necessarily distinct). The corresponding sequence of odd numbers is also finite, but he did not calculate the last term, and only showed that it is below 2004452254833. %H A306720 Amiram Eldar, <a href="/A306720/b306720.txt">Table of n, a(n) for n = 1..6066</a> %H A306720 Herman J. J. te Riele, <a href="https://ir.cwi.nl/pub/9050">On the representation of the positive integers as the sum of two unitary abundant numbers</a>, Stichting Mathematisch Centrum, Numerieke Wiskunde NW 19/75 (1975). %e A306720 Since the unitary abundant numbers begin with 30, 42, 66, 70, ... the first integers which are missing from this sequence are 60 = 30 + 30, 72 = 30 +42, 84 = 42 + 42, 96 = 30 + 66, 100 = 30 + 70, ... %Y A306720 Cf. A034683, A048242. %K A306720 nonn,fini,full %O A306720 1,1 %A A306720 _Amiram Eldar_, Mar 06 2019