4,1
(n-3)(n^2+6n-10)/6, n>3.
Sequence in context: A048021 A133268 A056108 this_sequence A037984 A073361 A155013
Adjacent sequences: A055828 A055829 A055830 this_sequence A055832 A055833 A055834
nonn
Clark Kimberling (ck6(AT)evansville.edu), May 28 2000
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