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a(n)=T(n+1,n), array T given by A048212.
1

%I #9 Jun 06 2021 02:52:24

%S 1,5,11,19,28,40,55,71,91,113,137,162,188,220,253,287,324,362,403,448,

%T 495,543,596,652,711,772,834,898,966,1035,1109,1185,1262,1340,1421,

%U 1505,1592,1680,1769,1865,1963,2063,2166,2271,2377

%N a(n)=T(n+1,n), array T given by A048212.

%F a(n) = A004979(n + 2) - 3. - _Sean A. Irvine_, Jun 05 2021

%Y Cf. A004979.

%K nonn

%O 1,2

%A _Clark Kimberling_