1,4
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Cf. A052446, ..., A052448.
Sequence in context: A048175 A020132 A013201 this_sequence A002873 A042171 A133148
Adjacent sequences: A052443 A052444 A052445 this_sequence A052447 A052448 A052449
nonn,more
Eric Weisstein (eric(AT)weisstein.com)
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