%I A047219
%S A047219 1,3,6,8,11,13,16,18,21,23,26,28,31,33,36,38,41,43,46,48,51,53,56,58,
%T A047219 61,63,66,68,71,73,76,78,81,83,86,88,91,93,96,98,101,103,106,108,111,
%U A047219 113,116,118,121,123,126,128
%N A047219 Numbers that are congruent to {1, 3} mod 5.
%F A047219 a(n)=Floor[(5n+2)/2]. - Santi Spadaro (spados(AT)katamail.com), Jul 24 
               2001
%F A047219 Row sums of triangle A131900 - Gary W. Adamson (qntmpkt(AT)yahoo.com), 
               Jul 25 2007
%F A047219 a(n)=5*n-a(n-1)-6 (with a(1)=1) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Nov 22 2009]
%e A047219 For n=2, a(2)=5*2-1-6=3; n=3, a(3)=5*3-3-6=6; n=4, a(4)=5*4-6-6=8 [From 
               Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 22 2009]
%Y A047219 Cf. A000566.
%Y A047219 Cf. A131900.
%Y A047219 Sequence in context: A013642 A140482 A118011 this_sequence A139477 A122437 
               A090848
%Y A047219 Adjacent sequences: A047216 A047217 A047218 this_sequence A047220 A047221 
               A047222
%K A047219 nonn,new
%O A047219 1,2
%A A047219 N. J. A. Sloane (njas(AT)research.att.com).