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a(n)=least number m such that m-a(n-1)<>a(j)-a(k) for all j,k less than m; a(1)=1, a(2)=3.
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%I #10 Feb 19 2019 03:56:52

%S 1,3,4,8,14,22,31,43,58,74,94,116,140,165,191,223,256,290,327,365,406,

%T 451,498,546,599,655,714,775,837,901,969,1038,1112,1188,1265,1343,

%U 1424,1508,1595,1683,1772,1868,1966,2066,2169,2274

%N a(n)=least number m such that m-a(n-1)<>a(j)-a(k) for all j,k less than m; a(1)=1, a(2)=3.

%Y Cf. A048212, A048216, A048217.

%K nonn

%O 1,2

%A _Clark Kimberling_