%I A114139
%S A114139 2,2,1,1,1,1,1,1,2,2,0,3,2,3,2,2,3,4,3,3,1,1,3,2
%V A114139 -2,-2,1,-1,1,1,1,1,2,2,0,3,2,3,2,2,3,4,3,3,1,1,3,2
%N A114139 Changes in United States postal rates per ounce since 1863.
%C A114139 Benjamin Franklin, first Postmaster General of the United States, applied 
               computational complexity theory to Economics by changing the business 
               plan for American mail by changing from payment by distance to payment 
               by weight. "Before stamps were used a person had to collect his mail 
               at the post office and pay for it. Franklin stopped the money loss 
               on unclaimed mail in Philadelphia by printing in his paper the names 
               of persons who had mail awaiting them. He also developed a simple, 
               accurate way of keeping post-office accounts. In 1753 Franklin was 
               made deputy postmaster general for all the colonies." [Encyclopedia 
               Brittanica]
%D A114139 R. Alter and J. A. Barnett, A postage stamp problem, Amer. Math. Monthly, 
               87 (1980), 206-210.
%D A114139 R. K. Guy, Unsolved Problems in Number Theory, C12.
%D A114139 W. F. Lunnon, A postage stamp problem. Comput. J. 12 (1969) 377-380.
%H A114139 Author?, <a href="http://www.usps.com/communications/news/stamps/2006/
               sr06_004.pdf">U.S. Postal Service Commemorates Benjamin Franklin's 
               300th Birthday.</a>
%H A114139 A. K. Dart, <a href="http://www.akdart.com/postrate.html">Postage rates 
               USA</a>
%H A114139 1847usa.com, <a href="http://www.1847usa.com/USPostageByYear.htm">United 
               States Postage Stamps By Year</a>.
%F A114139 a(n) = first differences of A114062.
%e A114139 a(1) = -2 because the rate per half ounce was lowered effective 3 March 
               1863 from 3 cents to 2 cents; thereafter rates were per ounce.
%Y A114139 Cf. A114062, A001212, A001213, A014616, A001208, A001209, A001210, A001211, 
               A001212, A001213, A001214, A001215, A001216, A005342, A005343, A005344, 
               A014616, A053346, A053348, A075060, A084192, A084193.
%Y A114139 Sequence in context: A156839 A025453 A094215 this_sequence A029884 A118164 
               A099563
%Y A114139 Adjacent sequences: A114136 A114137 A114138 this_sequence A114140 A114141 
               A114142
%K A114139 easy,fini,sign
%O A114139 1,1
%A A114139 Jonathan Vos Post (jvospost3(AT)gmail.com), Feb 03 2006