1,1
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Cf. A050289.
Sequence in context: A034650 A035525 A133191 this_sequence A158707 A159568 A115173
Adjacent sequences: A050287 A050288 A050289 this_sequence A050291 A050292 A050293
nonn
Eric Weisstein (eric(AT)weisstein.com)
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