0,2
(1/180) [2500*5^n - 3456*4^n + 1215*3^n - 80*2^n + (-1)^n].
First differences of A099111.
Sequence in context: A159449 A090230 A133652 this_sequence A052178 A123902 A085374
Adjacent sequences: A004055 A004056 A004057 this_sequence A004059 A004060 A004061
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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