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 1-3 of 3 results.

A034583 Dimension of an irreducible R-module for Clifford algebra Cl_n.

Original entry on oeis.org

1, 2, 4, 4, 8, 8, 8, 8, 16, 32, 64, 64, 128, 128, 128, 128, 256, 512, 1024, 1024, 2048, 2048, 2048, 2048, 4096, 8192, 16384, 16384, 32768, 32768, 32768, 32768, 65536, 131072, 262144, 262144, 524288, 524288, 524288, 524288, 1048576, 2097152, 4194304, 4194304, 8388608, 8388608, 8388608, 8388608, 16777216, 33554432, 67108864, 67108864, 134217728
Offset: 0

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Author

Keywords

References

  • H. Blaine Lawson, Jr. and M.-L. Michelsohn, Spin Geometry, Princeton, p. 33.
  • Pertti Lounesto, Clifford Algebras and Spinors, Cambridge, 1997, p. 226.

Crossrefs

Programs

  • PARI
    Vec(-(8*x^7+8*x^6+8*x^5+8*x^4+4*x^3+4*x^2+2*x+1) / ((2*x^2-2*x+1)*(2*x^2-1)*(2*x^2+1)*(2*x^2+2*x+1)) + O(x^100)) \\ Colin Barker, Mar 27 2015

Formula

a(n) = 2^A034584(n). a(n+8) = 16*a(n).
G.f.: -(8*x^7+8*x^6+8*x^5+8*x^4+4*x^3+4*x^2+2*x+1) / ((2*x^2-2*x+1)*(2*x^2-1)*(2*x^2+1)*(2*x^2+2*x+1)). - Colin Barker, Mar 27 2015

A034584 Radon-Hurwitz numbers: log_2 of dimension of an irreducible R-module for Clifford algebra Cl_n.

Original entry on oeis.org

0, 1, 2, 2, 3, 3, 3, 3, 4, 5, 6, 6, 7, 7, 7, 7, 8, 9, 10, 10, 11, 11, 11, 11, 12, 13, 14, 14, 15, 15, 15, 15, 16, 17, 18, 18, 19, 19, 19, 19, 20, 21, 22, 22, 23, 23, 23, 23, 24, 25, 26, 26, 27, 27, 27, 27, 28, 29, 30, 30, 31, 31, 31, 31
Offset: 0

Views

Author

Keywords

References

  • H. Blaine Lawson, Jr. and M.-L. Michelsohn, Spin Geometry, Princeton, p. 33.
  • Pertti Lounesto, Clifford Algebras and Spinors, Cambridge, 1997, p. 226.

Crossrefs

Programs

  • PARI
    concat(0, Vec(x*(1+ x + x^3 + x^7)/((1 - x)*(1 - x^8)) + O(x^80))) \\ Michel Marcus, Oct 03 2014

Formula

a(n+8) = a(n) + 4, n >= 0, a(0) = 0, a(1) = 1, a(2)= a(3) = 2, a(4) = a(5) = a(6) = a(7) =3.
G.f.: x*(1+ x + x^3 + x^7)/((1 - x)*(1 - x^8)). - Wolfdieter Lang, Oct 03 2014

A034585 Dimension of an irreducible Z_2 graded H-module for Clifford algebra Cl_n.

Original entry on oeis.org

2, 2, 2, 2, 4, 8, 16, 16, 32, 32, 32, 32, 64, 128, 256, 256, 512, 512, 512, 512, 1024, 2048, 4096, 4096, 8192, 8192, 8192, 8192, 16384, 32768, 65536, 65536, 131072, 131072, 131072, 131072, 262144, 524288, 1048576, 1048576, 2097152, 2097152, 2097152, 2097152
Offset: 1

Views

Author

Keywords

References

  • H. Blaine Lawson, Jr. and M.-L. Michelsohn, Spin Geometry, Princeton, p. 285.

Crossrefs

Formula

a(n) = 16 * a(n-8), n > 8. - Sean A. Irvine, Aug 28 2020

Extensions

More terms from Sean A. Irvine, Aug 28 2020
Showing 1-3 of 3 results.