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Search: id:A007069
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| A007069 |
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First column of spectral array W(sqrt 2).
(Formerly M1329)
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+0
3
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| 1, 2, 5, 7, 9, 11, 12, 15, 16, 19, 21, 22, 25, 26, 29, 31, 33, 35, 36, 39, 41, 43, 45, 46, 49, 50, 53, 55, 57, 59, 60, 63, 65, 67, 69, 70, 73, 74, 77, 79, 80, 83, 84, 87, 89, 91, 93, 94, 97, 98, 101, 103, 104, 107, 108, 111, 113, 115, 117, 118, 121, 123, 125, 127, 128, 131
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A. Fraenkel and C. Kimberling, "Generalized Wythoff arrays, shuffles and interspersions," Discrete Mathematics 126 (1994) 137-149.
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FORMULA
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Iterated floor function : a(n)=floor(sqrt(2)*floor(sqrt(2)*n)); a(n)=A001951(A001951(n)); a(n)=2*n-1-A059648(n) - Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 06 2003
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CROSSREFS
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Sequence in context: A062288 A077059 A007300 this_sequence A140139 A130773 A163985
Adjacent sequences: A007066 A007067 A007068 this_sequence A007070 A007071 A007072
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein (mira(AT)math.berkeley.edu)
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EXTENSIONS
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More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 06 2003
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