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Search: id:A067119
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| A067119 |
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a(n) = floor[X/Y] where X = concatenation of first n even numbers in increasing order and Y = n-th triangular number. |
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+0
2
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| 2, 8, 41, 246, 16454, 1175286, 88146471, 6855836706, 548466936480, 44874567530214, 3739547294184576, 316423232584848746, 27121991364415606839, 2350572584916019259453, 205675101180151685202190
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(4) = floor[2468/(1+2+3+4)] = floor[246.8] = 246.
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MAPLE
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for i from 1 to 33 do n := 2*i:c := n:n := n-2:while(n>0) do g := floor(log(c+1)/log(10)):c := c+10^(g+1)*n:n := n-2:end do:a[i] := floor(2*c/i/(i+1)):end do:q := seq(a[j], j=1..33);
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CROSSREFS
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Cf. A067112-A067118.
Adjacent sequences: A067116 A067117 A067118 this_sequence A067120 A067121 A067122
Sequence in context: A012534 A092354 A020083 this_sequence A093935 A099240 A134055
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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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