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Search: id:A159018
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| A159018 |
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a(0)=5; a(n)=a(n-1)+[sqrt(a(n-1)], n>0 . |
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+0
1
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| 5, 7, 9, 12, 15, 18, 22, 26, 31, 36, 42, 48, 54, 61, 68, 76, 84, 93, 102, 112, 122, 133, 144, 156, 168, 180, 193, 206, 220, 234, 249, 264, 280, 296, 313, 330, 348, 366, 385, 404, 424, 444, 465, 486, 508, 530, 553, 576, 600, 624, 648, 673, 698, 724, 750, 777, 804, 832, 860, 889, 918, 948, 978
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Row 1 in square array A159016 .
This sequence contains an infinity of squares . [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Apr 04 2009] The squares are the form [a(n)]^2 (with n>1) and a(n)=2*a(n-1) [A003945] (3,6,12,24,...,)
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CROSSREFS
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Cf. A028392
Sequence in context: A045236 A029664 A075329 this_sequence A005427 A116024 A115913
Adjacent sequences: A159015 A159016 A159017 this_sequence A159019 A159020 A159021
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KEYWORD
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nonn
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AUTHOR
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Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Apr 02 2009
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EXTENSIONS
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More terms and comments from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Apr 10 2009
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