OFFSET
0,4
FORMULA
GENERATING FUNCTION
Conjectural e.g.f.:
... 1/2+1/2{(2*cosh(sqrt(u)*z)-1)/(2*cosh(z)-1)}
= sum {n = 0..inf} R(n,u)*z^(2*n)/(2*n)!
= 1+(u-1)*z^2/2!+(u^2-12*u+11)*z^4/4!+....
RELATIONS WITH OTHER SEQUENCES
Column 0: Signed version of Glaisher's H' numbers A002114.
EXAMPLE
Triangle begins
n/k.|.........0...........1.........2........3.......4......5.....6
===================================================================
.0..|.........1
.1..|........-1...........1
.2..|........11.........-12.........1
.3..|......-301.........330.......-30........1
.4..|.....15371......-16856......1540......-56.......1
.5..|..-1261501.....1383390...-126420.....4620.....-90......1
.6..|.151846331..-166518132..15217290..-556248...10890...-132.....1
..
CROSSREFS
KEYWORD
AUTHOR
Peter Bala, Feb 22 2011
STATUS
approved