OFFSET
1,2
LINKS
Donatella Merlini, Massimo Nocentini, Algebraic Generating Functions for Languages Avoiding Riordan Patterns, Journal of Integer Sequences, Vol. 21 (2018), Article 18.1.3.
FORMULA
Conjecture: n*a(n) +(n-3)*a(n-1) +3*(-7*n+10)*a(n-2) +3*(n-1)*a(n-3) +40*(n-2)*a(n-4) +2*(-2*n+3)*a(n-5) +10*(-2*n+5)*a(n-6)=0.
CROSSREFS
KEYWORD
nonn
AUTHOR
R. J. Mathar, Aug 08 2015
STATUS
approved