This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A133080 Interpolation operator: Triangle with an even number of zeros in each line followed by 1 or 2 ones. 30
 1, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A133080 * [1,2,3,...] = A114753: (1, 3, 3, 7, 5, 11, 7, 15,...). Inverse of A133080: sub diagonal changes to (-1, 0, -1, 0, -1,...); main diagonal unchanged. A133080^(-1) * [1,2,3,...] = A093178: (1, 1, 3, 1, 5, 1, 7, 1, 9,...). In A133081, diagonal terms are switched with subdiagonal terms. LINKS G. C. Greubel, Table of n, a(n) for the first 50 rows, flattened FORMULA Infinite lower triangular matrix, (1,1,1...) in the main diagonal and (1,0,1,0,1,...) in the subdiagonal. Odd rows, (n-1) zeros followed by "1". Even rows, (n-2) zeros followed by "1, 1". T(n,n)=1. T(n,k)=0 if 1<=k

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

Last modified June 21 23:16 EDT 2018. Contains 305646 sequences. (Running on oeis4.)