3,1

G.f.: [x^3*(3-2x)*(1-3x+5x^2-3x^3+x^4)]/(1-x)^6. Differences of A027968. - Ralf Stephan, Feb 07 2004

A column of triangle A027011.

Sequence in context: A091621 A129921 A036670 this_sequence A000226 A036883 A114713

Adjacent sequences: A027964 A027965 A027966 this_sequence A027968 A027969 A027970

nonn

Clark Kimberling (ck6(AT)evansville.edu)