A130876: k>1
zak seidov
zakseidov at yahoo.com
Sun Aug 26 05:58:10 CEST 2007
Apparently k'd be >1:
Numbers that can be expressed as the sum of k>1
consecutive integers in only one way.
Zak
%I A130876
%S A130876
5,7,11,12,13,14,17,19,20,22,23,24,26,29,31,34,37,38,40,41,43,44,46,47,
%T A130876
48,52,53,56,58,59,61,62,67,68,71,73,74,76,79,80,82,83,86,88,89,92,94,
%U A130876
96,97,101,103,104,106,107,109,112,113,116,118
%N A130876 Numbers that can be expressed as the sum of
k consecutive integers in only one way.
%C A130876 The numbers can be seen as
sum{i=j..j+k-1}{i}, with j and k integer, being the
sum of k consecutive integers starting from j.
%e A130876 37 = 18+19;
%e A130876 48 = 15+16+17;
%e A130876 56 = 5+6+7+8+9+10+11;
%K A130876 easy,nonn,new
%O A130876 1,1
%A A130876 Paolo P. Lava & Giorgio Balzarotti
(ppl(AT)spl.at), Aug 21 2007
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