The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A133544 A007318 * A052474. 1
 1, 1, 2, 1, 4, 4, 1, 6, 12, 7, 1, 8, 24, 28, 12, 1, 10, 40, 70, 60, 13, 1, 12, 60, 140, 180, 78, 14, 1, 14, 84, 245, 420, 273, 98, 15, 1, 16, 112, 392, 840, 728, 392, 120, 16, 1, 18, 144, 588, 1512, 1638, 1176, 540, 144, 18 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Right border = A052474: (1, 2, 4, 7, 12, 13, 14, 15, 16, 18, 20, ...). Row sums = A057153: (1, 3, 9, 26, 73, 194, 485, 1150, ...). LINKS Table of n, a(n) for n=1..55. FORMULA Binomial transform of A052474 as a diagonalized matrix (A052474 as the diagonal of an infinite lower triangular matrix and the rest zeros). EXAMPLE First few rows of the triangle: 1; 1, 2; 1, 4, 4; 1, 6, 12, 7; 1, 8, 24, 28, 12; 1, 10, 40, 70, 60, 13; 1, 12, 60, 140, 180, 78, 14; ... CROSSREFS Cf. A052474, A057153. Sequence in context: A136672 A097750 A304623 * A303872 A013609 A154558 Adjacent sequences: A133541 A133542 A133543 * A133545 A133546 A133547 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Sep 14 2007 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 May 18 03:43 EDT 2024. Contains 372618 sequences. (Running on oeis4.)