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A090988
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Sequence composed of descending powers of 2 related to both A004736 and A090774.
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0
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2, 4, 2, 8, 4, 2, 16, 8, 4, 2, 32, 16, 8, 4, 2, 64, 32, 16, 8, 4, 2, 128, 64, 32, 16, 8, 4, 2, 256, 128, 64, 32, 16, 8, 4, 2, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 4096, 2048, 1024, 512, 256
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Given the subsequences in A090774 beginning with the vertex numbers 12,24,48,96,... the intermediate subsequences can be calculated using a(n). For example: 14,29,22,59,45,... = 12,25,20,51,41,... + 2,4,2,8,4,...
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FORMULA
| a(n) = 2^A004736(n)
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EXAMPLE
| A004736 begins
1
2 1
4 2 1
8 4 2 1
so a(n) begins
2
4 2
8 4 2
16 8 4 2
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MATHEMATICA
| Flatten[Table[2^n, {i, 15}, {n, i, 1, -1}]] (* From Harvey P. Dale, Dec 27 2011 *)
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CROSSREFS
| Cf. A004736, A090774.
Sequence in context: A093895 A030057 A134066 * A095728 A174147 A163897
Adjacent sequences: A090985 A090986 A090987 * A090989 A090990 A090991
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KEYWORD
| easy,nonn,tabl,uned
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AUTHOR
| Alford Arnold (Alford1940(AT)AOL.COM), Feb 29 2004
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