| 12, 21, 23, 31, 34, 41, 45, 51, 56, 61, 67, 71, 78, 81, 89, 91, 101, 110, 121, 131, 141, 151, 161, 171, 181, 191, 201, 210, 231, 241, 251, 261, 271, 281, 291, 301, 310, 341, 351, 361, 371, 381, 391, 401, 410, 451, 461, 471, 481, 491, 501, 510, 561, 571, 581
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Punctual Birds (A131881) are all numbers k with A132131(n) <= k < A132132(n) for some n Early Birds (A116700) are all numbers k with A132132(n) <= k < A132131(n+1) for some n
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LINKS
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Graeme McRae, Table of n, a(n) for n = 1..27348
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EXAMPLE
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a(1)=12 because 12 is the first Early Bird.
a(2)=21 because 21 is the second Early Bird.
a(3)=23 because 23 is the third Early Bird.
a(4)=31 because 31 is the fourth Early Bird.
a(5)=34 because 31-32 are Early Birds and 33 is not an Early Bird.
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CROSSREFS
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Cf. A033307, A117804, A116700, A131881, A132131, A132133.
Sequence in context: A082799 A089320 A116700 this_sequence A085926 A071263 A137480
Adjacent sequences: A132129 A132130 A132131 this_sequence A132133 A132134 A132135
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KEYWORD
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base,nonn
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AUTHOR
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Graeme McRae (g_m(AT)mcraefamily.com), Aug 11 2007
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