The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A130303 A130296 * A000012. 4
 1, 3, 1, 5, 2, 1, 7, 3, 2, 1, 9, 4, 3, 2, 1, 11, 5, 4, 3, 2, 1, 13, 6, 5, 4, 3, 2, 1, 15, 7, 6, 5, 4, 3, 2, 1, 17, 8, 7, 6, 5, 4, 3, 2, 1, 19, 9, 8, 7, 6, 5, 4, 3, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES H. S. M. Coxeter, Regular Polytopes, 3rd ed., Dover, NY, 1973, pp 159-162 LINKS FORMULA A130296 * A000012 as infinite lower triangular matrices. (1,3,5,...) as the left border; (1,2,3,...) in all other columns. e(n,k)= (e(n - 1, k)*e(n, k - 1) + 1)/e(n - 1, k - 1) EXAMPLE 1; 3, 1; 5, 2, 1; 7, 3, 2, 1; 9, 4, 3, 2, 1; 11, 5, 4, 3, 2, 1; 13, 6, 5, 4, 3, 2, 1; 15, 7, 6, 5, 4, 3, 2, 1; 17, 8, 7, 6, 5, 4, 3, 2, 1; 19, 9, 8, 7, 6, 5, 4, 3, 2, 1; MATHEMATICA Clear[e, n, k]; e[n_, 0] := 2*n - 1; e[n_, k_] := 0 /; k >= n; e[n_, k_] := (e[n - 1, k]*e[n, k - 1] + 1)/e[n - 1, k - 1]; Table[Table[e[n, k], {k, 0, n - 1}], {n, 1, 10}]; Flatten[%] CROSSREFS Cf. A130296, A000012, A034856 (row sums), A130302 (commuted matrix product) Sequence in context: A212332 A131032 A130323 * A100898 A101350 A199478 Adjacent sequences: A130300 A130301 A130302 * A130304 A130305 A130306 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, May 20 2007 EXTENSIONS Additional comments from Roger L. Bagula and Gary W. Adamson, Mar 28 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 27 05:57 EST 2023. Contains 359837 sequences. (Running on oeis4.)