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 A134482 Triangle read by rows: row n consists of n followed by the numbers n through 2n-2. 1
 1, 2, 2, 3, 3, 4, 4, 4, 5, 6, 5, 5, 6, 7, 8, 6, 6, 7, 8, 9, 10, 7, 7, 8, 9, 10, 11, 12, 8, 8, 9, 10, 11, 12, 13, 14, 9, 9, 10, 11, 12, 13, 14, 15, 16, 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 11, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 12, 12, 13, 14, 15, 16 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = A005448. LINKS FORMULA T(n,1)=n, T(n,k)=n+k-2 for 2<=k<=n. G.f.=z(1-2tz+2zt^2-t^3*z^3)/[(1-z)(1-tz)]^2. - Emeric Deutsch, Nov 24 2007 EXAMPLE First few rows of the triangle are: 1; 2, 2; 3, 3, 4; 4, 4, 5, 6; 5, 5, 6, 7, 8; 6, 6, 7, 8, 9, 10; 7, 7, 8, 9, 10, 11, 12; ... MAPLE T:=proc(n, k) if n

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Last modified April 10 08:09 EDT 2021. Contains 342845 sequences. (Running on oeis4.)