1,2
a(n)=ceiling[circumference of a circle of radius n]; a(n)=ceiling[2*pi*n]. - Mohammad K. Azarian (azarian(AT)evansville.edu), Feb 29 2008
Cf. A066643.
Sequence in context: A080199 A016921 A123843 this_sequence A039281 A045115 A096452
Adjacent sequences: A004079 A004080 A004081 this_sequence A004083 A004084 A004085
nonn
Clark Kimberling (ck6(AT)evansville.edu)
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