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Search: id:A157451
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| A157451 |
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A sequence of numbers from a triangular sequence as digits base n+1: t(n,m)== Min[1 + Floor[m/2], 1 + Floor[(n - m)/2]]; a(n)=FromDigits[{Table[t[n, m], {m, 0, n}], n + 1}, n + 1]. |
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1
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| 1, 3, 13, 85, 806, 9583, 140050, 2434185, 49031983, 1122332211, 28768909071, 816222524845, 25389827448220, 859153189293015, 31417769545499716, 1234605616147931665, 51882038993710230701, 2321660210597147557819
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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t(n,m)== Min[1 + Floor[m/2], 1 + Floor[(n - m)/2]]; a(n)=FromDigits[{Table[t[n, m], {m, 0, n}], n + 1}, n + 1].
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EXAMPLE
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{1},
{1, 1},
{1, 1, 1},
{1, 1, 1, 1},
{1, 1, 2, 1, 1},
{1, 1, 2, 2, 1, 1},
{1, 1, 2, 2, 2, 1, 1},
{1, 1, 2, 2, 2, 2, 1, 1},
{1, 1, 2, 2, 3, 2, 2, 1, 1},
{1, 1, 2, 2, 3, 3, 2, 2, 1, 1},
{1, 1, 2, 2, 3, 3, 3, 2, 2, 1, 1}
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MATHEMATICA
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t[n_, m_] = Min[1 + Floor[m/2], 1 + Floor[(n - m)/2]];
Table[FromDigits[{Table[t[n, m], {m, 0, n}], n + 1}, n + 1], {n, 0, 20}]
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CROSSREFS
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A139038
Sequence in context: A125500 A121679 A023037 this_sequence A152112 A167810 A054420
Adjacent sequences: A157448 A157449 A157450 this_sequence A157452 A157453 A157454
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KEYWORD
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nonn,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Mar 01 2009
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