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Search: id:A062547
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| A062547 |
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a(n) is least odd integer not a partial sum of 1, 3, ..., a(n-1). |
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+0
2
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| 1, 3, 5, 7, 17, 19, 53, 55, 161, 163, 485, 487, 1457, 1459, 4373, 4375, 13121, 13123, 39365, 39367, 118097, 118099, 354293, 354295, 1062881, 1062883, 3188645, 3188647, 9565937, 9565939, 28697813, 28697815, 86093441, 86093443, 258280325
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OFFSET
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0,2
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COMMENT
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Odd indexed terms = A048473 and even indexed terms a(2n) = a(2n-1)+2;
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EXAMPLE
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Partial sums of 1;3;5 are 1;3;4;5;6;8;9 and 7 is the least missing odd integer, hence the next term is 7.
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MATHEMATICA
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Table[ -1+ 2 3^Floor[k/2]+2 Mod[k, 2], {k, 0, 36}]
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CROSSREFS
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Cf. A048473, A062548.
Sequence in context: A092951 A001259 A087126 this_sequence A125739 A122853 A137258
Adjacent sequences: A062544 A062545 A062546 this_sequence A062548 A062549 A062550
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KEYWORD
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nonn
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AUTHOR
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Wouter Meeussen (wouter.meeussen(AT)pandora.be), Jun 26 2001
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