3,4
Third differences seem to be A002620(n)+1.
Sequence in context: A070289 A035961 A051056 this_sequence A023027 A051014 A035968
Adjacent sequences: A055800 A055801 A055802 this_sequence A055804 A055805 A055806
nonn
Clark Kimberling (ck6(AT)evansville.edu), May 28 2000
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