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A079301
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Number of minimal Brauer chains for n.
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7
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1, 1, 1, 1, 2, 2, 5, 1, 3, 4, 15, 3, 9, 14, 4, 1, 2, 7, 31, 6, 26, 40, 4, 4, 13, 22, 5, 23, 114, 12, 64, 1, 2, 4, 43, 12, 33, 87, 18, 8, 20, 78, 4, 69, 14, 8, 183, 5, 11, 34, 4, 35, 171, 16, 139, 32, 148
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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COMMENTS
| In a general addition chain, each element > 1 is a sum of two previous elements. In a Brauer chain, each element > 1 is a sum of the immediately previous element and another previous element.
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LINKS
| D. W. Wilson, Table of n, a(n) for n = 1..1024
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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EXAMPLE
| 7 has a(7) = 5 minimal Brauer chains: (1,2,3,4,7), (1,2,3,5,7), (1,2,3,6,7), (1,2,4,5,7), (1,2,4,6,7).
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CROSSREFS
| Sequence in context: A173169 A016586 A073690 * A079300 A128932 A071950
Adjacent sequences: A079298 A079299 A079300 * A079302 A079303 A079304
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KEYWORD
| nonn
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AUTHOR
| David W Wilson (davidwwilson(AT)comcast.net), Feb 09 2003
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