3,2
G.f.: x^3*(1-3x+4x^2+x^3-4x^4+3x^5-x^6)/(1-x)^7. Differences of A027969. - Ralf Stephan, Feb 07 2004
A column of triangle A026998.
Adjacent sequences: A027965 A027966 A027967 this_sequence A027969 A027970 A027971
Sequence in context: A062432 A131046 A109803 this_sequence A027970 A027972 A002878
nonn
Clark Kimberling (ck6(AT)evansville.edu)
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