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 A056526 #16 Jun 23 2020 08:58:34 %S A056526 2,4,6,6,8,12,10,14,16,12,18,24,14,34,26,16,30,36,18,42,38,12,60,22, %T A056526 48,38,46,36,60,54,44,36,84,22,60,84,18,78,72,60,38,112,12,96,114,26, %U A056526 88,92,34,90,138,26,82,98,112,54,170,36,60,168,52,128,52,128,94,108,90,188 %N A056526 First differences of Flavius Josephus's sieve. %C A056526 Also run lengths in A100617. - _Reinhard Zumkeller_, Jan 14 2015 %H A056526 Klaus Brockhaus, <a href="/A056526/b056526.txt">Table of n, a(n) for n=1..10000</a> %H A056526 <a href="/index/J#Josephus">Index entries for sequences related to the Josephus Problem</a> %F A056526 a(n) = A000960(n+1) - A000960(n). %e A056526 Flavius's sieve starts 1,3,7,13,19,27,39,49 so first differences are 2,4,6,6,8,12,10. %o A056526 (Haskell) %o A056526 a056526 n = a056526_list !! (n-1) %o A056526 a056526_list = zipWith (-) (tail a000960_list) a000960_list %o A056526 -- _Reinhard Zumkeller_, Jan 14 2015 %Y A056526 Cf. A000960 for definition, A139363 (records), A139364 (where records occur). %Y A056526 Cf. A100617, A250007. %K A056526 nonn %O A056526 1,1 %A A056526 _Henry Bottomley_, Jun 16 2000