1,1
G.f.: [x(3+4x-4x^2)]/[(1-x-x^2)(1-x)^2]. - Ralf Stephan, Apr 28 2004
Sequence in context: A031378 A144391 A024836 * A183436 A154300 A051805
Adjacent sequences: A023550 A023551 A023552 * A023554 A023555 A023556
nonn
Clark Kimberling (ck6(AT)evansville.edu)