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Search: id:A071623
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| 1, 4, 5, 6, 7, 8, 15, 18, 21, 22, 35, 64, 65, 130, 131, 160, 161, 170, 175, 186, 187, 190, 391, 392, 393, 508, 511, 514, 515, 516, 519, 530, 535, 536, 539, 540, 543, 552, 553, 566, 577, 584, 587, 588, 593, 594, 627, 630, 631, 636
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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For some n, a(n+1)-a(n)=1.
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PROGRAM
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(PARI) for(n=1, 50, s=1; while(abs(n+sum(i=1, s, sign((-1)^floor((3/2)^i))))>0, s++); print1(s, ", "))
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CROSSREFS
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Cf. A071532.
Sequence in context: A047567 A050038 A059709 this_sequence A140293 A075341 A143789
Adjacent sequences: A071620 A071621 A071622 this_sequence A071624 A071625 A071626
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 22 2002
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