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Search: id:A067091
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| A067091 |
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Floor[X/Y] where X = concatenation of the (n+1)-st even number through the (2n)-th even number and Y = concatenation of first n even numbers. |
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13
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| 2, 2, 329, 4101, 4919, 5737, 6556, 7374, 8193, 9012, 9830, 10649, 11467, 12286, 13104, 13923, 14741, 15560, 16378, 17197, 18015, 18834, 19652, 20471, 212899, 22108437, 2292696195, 237454867452, 24564011532104, 2538253631893694
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Hans Havermann (pxp(AT)rogers.com), First 1000 terms
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EXAMPLE
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a(4) = floor[10121416/2468] =[4101.05996758508914100486223662885] = 4101. a(7)= floor[16182022242628/2468101214] =floor[6556.4662222268166673]= 6556.
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MATHEMATICA
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z[n_] := Block[{a = "", m = n}, While[ Length[m] > 0, a = StringJoin[a, ToString[m[[1]]]]; m = Drop[m, 1]]; ToExpression[a]]; Table[ Floor[ z[Table[2i, {i, n + 1, 2n}]] / z[ Table[2i, {i, 1, n}]]], {n, 1, 30}]
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CROSSREFS
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Cf. A067088, A067089, A067090.
Sequence in context: A078241 A068103 A119512 this_sequence A093596 A111819 A079237
Adjacent sequences: A067088 A067089 A067090 this_sequence A067092 A067093 A067094
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KEYWORD
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easy,base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 07 2002
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 14 2002
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