%I #12 Dec 25 2021 18:35:23
%S 1,5,7,20,31,53,64,86,97,110,121,143,154,176,187,209,211,233,244,266,
%T 277,299,310,323,334,356,367,389,400,413,424,446,457,479,490,512,514,
%U 536,547,569,580,602,613,626,637,659,670,692,703,716
%N Selfnumbers (A003052) that are not divisible by 3.
%D D. R. Kaprekar, The Mathematics of the New Self Numbers, Privately printed, 311 Devlali Camp, Devlali, India, 1963.
%H Reinhard Zumkeller, <a href="/A249047/b249047.txt">Table of n, a(n) for n = 1..10000</a>
%H D. R. Kaprekar, <a href="/A003052/a003052_2.pdf">The Mathematics of the New Self Numbers</a> [annotated and scanned]
%o (Haskell)
%o a249047 n = a249047_list !! (n1)
%o a249047_list = filter ((> 0) . flip mod 3) a003052_list
%o  _Reinhard Zumkeller_, Oct 31 2014
%Y Cf. A003052, A249045A249048.
%K nonn,base
%O 1,2
%A _N. J. A. Sloane_, Oct 30 2014
