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Search: id:A067120
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| A067120 |
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a(n) =floor[X/Y] where X= concatenation of first n ODD numbers in increasing order and Y = n-th triangular number. |
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+0
2
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| 1, 4, 22, 135, 905, 64662, 4849682, 377197536, 30175802922, 2468929330031, 205744110835938, 17409117070733232, 1492210034634277058, 129324869668304011738, 11315926095976601027106
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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a(4) floor[1357/(1+2+3+4)] = floor[135.7] =135.
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MAPLE
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for i from 1 to 33 do n := 2*i-1:c := n:n := n-2:while(n>0) do g := floor(log(c)/log(10)):c := c+10^(g+1)*n:n := n-2:end do:a[i] := floor(2*c/i/(i+1)):end do:q2 := seq(a[j], j=1..33);
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CROSSREFS
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Cf. A067112-A067119.
Sequence in context: A088536 A066380 A007195 this_sequence A069835 A007196 A091638
Adjacent sequences: A067117 A067118 A067119 this_sequence A067121 A067122 A067123
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KEYWORD
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easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 08 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 23 2002
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