OFFSET
0,1
FORMULA
a(n)=A111999(n+3, 2)/2, n>=0.
Conjecture: +n*(4*n+5)*a(n) +(2*n+3)*(n+2)*(4*n+9)*a(n-1)=0. - R. J. Mathar, Jul 09 2017
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Wolfdieter Lang, Sep 12 2005
STATUS
approved