1,2
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Cf. A052459, A052460.
Sequence in context: A105988 A083620 A097317 this_sequence A069398 A053018 A046436
Adjacent sequences: A052458 A052459 A052460 this_sequence A052462 A052463 A052464
nonn,easy
Eric Weisstein (eric(AT)weisstein.com)
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