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Search: id:A161411
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| 4, 12, 12, 36, 12, 36, 36, 108, 12, 36, 36, 108, 36, 108, 108, 324, 12, 36, 36, 108, 36, 108, 108, 324, 36, 108, 108, 324, 108, 324, 324, 972, 12, 36, 36, 108, 36, 108, 108, 324, 36, 108, 108, 324, 108, 324, 324, 972, 36, 108, 108, 324, 108, 324, 324, 972, 108, 324, 324
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The rows of the triangle in A147582 converge to this sequence.
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LINKS
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O. E. Pol, Illustration of initial terms (Neighbors of the vertices) [From Omar E. Pol (info(AT)polprimos.com), Nov 17 2009]
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FORMULA
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a(n) = A048883(n-1)*4.
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EXAMPLE
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If written as a triangle:
.4;
.12;
.12,36;
.12,36,36,108;
.12,36,36,108,36,108,108,324;
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CROSSREFS
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Cf. A139250, A139251, A160413, A160415, A160417.
Cf. A000079, A048883, A147582, A160410, A160414.
Sequence in context: A120213 A005886 A096442 this_sequence A009115 A051434 A074138
Adjacent sequences: A161408 A161409 A161410 this_sequence A161412 A161413 A161414
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KEYWORD
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nonn,tabf
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), May 20 2009, Jun 13 2009, Jun 14 2009
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EXTENSIONS
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Edited by David Applegate and N. J. A. Sloane, Jul 13 2009
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