cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A269301 Normalization coefficients for quantum Pascal's pyramid, numerators of: T(n,k,m) = ((n - m)! m!)/(2^n (n - k)! k!).

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 3, 3, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 5, 5, 1, 1, 1, 1, 5, 5, 1, 1, 1, 1, 5, 5, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1
Offset: 0

Views

Author

Bradley Klee, Feb 22 2016

Keywords

Comments

Read by block by row, i.e., a( x(n,k,m) ) have x(n,k,m) = ( sum_{i=0}^n i^2 ) + k ( n + 1 ) + m and (n,k,m) >= 0. See comments in A268533 for relevance.

Examples

			First nontrivial block:
1, 1, 1, 1
3, 1, 1, 3
3, 1, 1, 3
1, 1, 1, 1
		

Crossrefs

Denominators: A269302. Cf. A268533.

Programs

  • Mathematica
    NormFrac[Block_] :=
    Outer[Function[{n, k, m}, ((n - m)! m!)/(2^n (n - k)! k!)][
        Block, #1, #2] &, Range[0, Block], Range[0, Block], 1]; Flatten[
    Numerator[NormFrac[#]] & /@ Range[0, 5]]

Formula

T(n,k,m) = Numerator[((n - m)! m!)/(2^n (n - k)! k!)]

A269302 Normalization coefficients for quantum Pascal's pyramid, denominators of: T(n,k,m) = ((n - m)! m!)/(2^n (n - k)! k!).

Original entry on oeis.org

1, 2, 2, 2, 2, 4, 8, 4, 2, 4, 2, 4, 8, 4, 8, 24, 24, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 24, 24, 8, 16, 64, 96, 64, 16, 4, 16, 24, 16, 4, 8, 32, 16, 32, 8, 4, 16, 24, 16, 4, 16, 64, 96, 64, 16, 32, 160, 320, 320, 160, 32, 32, 32, 64, 64, 32, 32, 16, 16, 32, 32, 16, 16, 16, 16, 32, 32, 16, 16, 32, 32, 64, 64, 32, 32, 32, 160, 320, 320, 160, 32
Offset: 0

Views

Author

Bradley Klee, Feb 22 2016

Keywords

Comments

Read by block by row, i.e., a( x(n,k,m) ) have x(n,k,m) = ( sum_{i=0}^n i^2 ) + k ( n + 1 ) + m and (n,k,m) >= 0. See comments in A268533 for relevance.

Examples

			First few blocks:
1
. . 2, 2
. . 2, 2
. . . . .  4, 8, 4
. . . . .  2, 4, 2
. . . . .  4, 8, 4
		

Crossrefs

Numerators: A269301. Cf. A268533.

Programs

  • Mathematica
    NormFrac[Block_] :=
    Outer[Function[{n, k, m}, ((n - m)! m!)/(2^n (n - k)! k!)][
        Block, #1, #2] &, Range[0, Block], Range[0, Block], 1]; Flatten[
    Denominator[NormFrac[#]] & /@ Range[0, 5]]

Formula

T(n,k,m) = Denominator[((n - m)! m!)/(2^n (n - k)! k!)]
Showing 1-2 of 2 results.