|
%I #24 May 08 2017 11:49:01
%S 2,4,6,8,12,16,22,26,32,36,52,56,72,76,94,96,106,114,124,138,144,154,
%T 164,174,194,198,204,212,228,252,262,276,290,296,310,350,354,360,364,
%U 378,394,412,418,438,442,472,476,482,486,506,516,520,546,564,618,632
%N (2,4) Ulam sequence
%C This sequence is 2*A002858, since in general U(k*m, k*n) = k * U(m, n), where U(m, n) is the (m, n)-Ulam sequence. - _Enrique Navarrete_, May 05 2017
%H Reinhard Zumkeller, <a href="/A048951/b048951.txt">Table of n, a(n) for n = 1..1000</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/UlamSequence.html">Ulam Sequence</a>
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Ulam_number">Ulam number</a>
%H <a href="/index/U#Ulam_num">Index entries for Ulam numbers</a>
%o (Haskell)
%o a048951 n = a048951_list !! (n-1)
%o a048951_list = 2 : 4 : ulam 2 4 a048951_list
%o -- Function ulam as defined in A002858.
%o -- _Reinhard Zumkeller_, Nov 03 2011
%Y Cf. A002858.
%K nonn
%O 1,1
%A _Eric W. Weisstein_
|
