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Search: id:A004201
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A004201 Accept one, reject one, accept two, reject two, ... +0
8
1, 3, 4, 7, 8, 9, 13, 14, 15, 16, 21, 22, 23, 24, 25, 31, 32, 33, 34, 35, 36, 43, 44, 45, 46, 47, 48, 49, 57, 58, 59, 60, 61, 62, 63, 64, 73, 74, 75, 76, 77, 78, 79, 80, 81, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 133, 134, 135 (list; graph; listen)
OFFSET

1,2

COMMENT

a(n) are the numbers satisfying m - 0.5 < sqrt(a(n)) <= m for some positive integer m. - Floor van Lamoen (fvlamoen(AT)hotmail.com), Jul 24 2001

a(n+1) - a(n) = A130296(n+1). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 16 2008

FORMULA

a(n) = A061885(n-1)+1. [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Jul 05 2009]

CROSSREFS

Cf. A004202.

Sequence in context: A110133 A154366 A100452 this_sequence A109054 A129142 A075752

Adjacent sequences: A004198 A004199 A004200 this_sequence A004202 A004203 A004204

KEYWORD

nonn,nice

AUTHOR

Alexander Stasinski

page 1

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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