Search: id:A143808
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%I A143808
%S A143808 1,1,1,1,2,2,1,2,4,5,1,2,4,10,12,1,2,4,10,24,29,1,2,4,10,24,58,70,1,2,
               4,
%T A143808 10,24,58,140,169,1,2,4,10,24,58,140,338,408,1,2,4,10,24,58,140,338,816,
%U A143808 985
%N A143808 Triangle read by rows, first n terms of the sequence (1, 2, 4, 10,...) 
               followed by P(n); where (2, 4, 10, 12,...) = twice Pell numbers.
%C A143808 Row sums = A000129(n), the Pell numbers: (1, 2, 5, 12,...).
%C A143808 First few rows of the triangle =
%C A143808 1;
%C A143808 1, 1;
%C A143808 1, 2, 2;
%C A143808 1, 2, 4, 5;
%C A143808 1, 2, 4, 10, 12;
%C A143808 1, 2, 4, 10, 24, 29;
%C A143808 1, 2, 4, 10, 24, 58, 70;
%C A143808 1, 2, 4, 10, 24, 58, 140, 169;
%Y A143808 A000129
%Y A143808 Sequence in context: A144218 A098691 A035364 this_sequence A059594 A125678 
               A091562
%Y A143808 Adjacent sequences: A143805 A143806 A143807 this_sequence A143809 A143810 
               A143811
%K A143808 nonn,tabl
%O A143808 0,5
%A A143808 Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 01 2008

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