%I #10 Feb 08 2022 19:31:07
%S 1,2,2,3,2,3,4,2,3,4,5,2,3,4,5,6,2,3,4,5,6,7,2,3,4,5,6,7,8,2,3,4,5,6,
%T 7,8,9,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,11,2,3,4,5,6,7,8,9,10,11,
%U 12,2,3,4,5,6,7,8,9,10,11,12
%N A130296 + A002260 - A000012. Triangle read by rows: row n consists of n, 2, 3, 4, ..., n.
%C Row sums = A034856; (1, 4, 8, 13, 19, 26, 34, ...).
%F A130296 + A002260 - A000012 as infinite lower triangular matrices.
%F T(n, 1) = n, T(n, k) = k for k > 1. - _Michel Marcus_, Feb 12 2014
%e First few rows of the triangle:
%e 1;
%e 2, 2;
%e 3, 2, 3;
%e 4, 2, 3, 4;
%e 5, 2, 3, 4, 5;
%e 6, 2, 3, 4, 5, 6;
%e 7, 2, 3, 4, 5, 6, 7;
%e ...
%t Table[Join[{n},Range[2,n]],{n,15}]//Flatten (* _Harvey P. Dale_, Feb 24 2021 *)
%o (PARI) t(n, k) = if (k==1, n, k); \\ _Michel Marcus_, Feb 12 2014
%Y Cf. A130296, A002260, A034856.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_, Jul 18 2007
%E More terms from _Michel Marcus_, Feb 12 2014
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