

A006372


Numbers of terms in expressions for coefficients of "Lovelock Lagrangians" (or "GaussBonnet forms") in terms of RiemannChristoffel curvature tensor and two of its contractions (viz., the Ricci curvature tensor and the Riemann curvature scalar) for ndimensional differentiable manifolds having a general linear connection.


4




OFFSET

0,3


LINKS

Table of n, a(n) for n=0..9.
C. Bogdanos, Diagrammatic derivation of Lovelock densities, Phys Rev. D 79 (10) (2009) 107501.
C. C. Briggs, A General Expression for the Quintic Lovelock Tensor, arXiv:grqc/9607033, 19961997.
C. C. Briggs, A General Expression for the Quartic Lovelock Tensor, arXiv:grqc/9703074, 1997.
R. J. Mathar, 2regular digraphs of the Lovelock Lagrangian, arXiv:1903.12477 [math.GM], 2019.


CROSSREFS

Cf. A006373, A045900 (conjectural), A306892 (2regular digraphs).
Sequence in context: A151426 A045900 A000738 * A148798 A148799 A148800
Adjacent sequences: A006369 A006370 A006371 * A006373 A006374 A006375


KEYWORD

nonn,more


AUTHOR

C. C. Briggs (ccb104(AT)vm.cac.psu.edu)


EXTENSIONS

a(6)a(8) from R. J. Mathar, Apr 08 2019
a(9) added by R. J. Mathar, Apr 15 2019


STATUS

approved



