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A074021
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Number of elements of GF(7^n) with trace 1 and subtrace 4.
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9
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OFFSET
| 1,2
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COMMENTS
| Same as the number of elements of GF(7^n) with trace 2 and subtrace 2. Same as the number of elements of GF(7^n) with trace 3 and subtrace 1. Same as the number of elements of GF(7^n) with trace 4 and subtrace 1. Same as the number of elements of GF(7^n) with trace 5 and subtrace 2. Same as the number of elements of GF(7^n) with trace 6 and subtrace 4.
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LINKS
| F. Ruskey, Number of Elements of GF(7^n) with given trace and subtrace
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EXAMPLE
| a(2;5,2)=2. Let GF(7^2) be defined by the field extension GF(7)[x]/( 3+5b+b^2 ). The two elements of GF(7^2) with trace 5 and subtrace 2 are { 4+2b, 1+5b }.
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CROSSREFS
| Cf. A074014, A074015, A074016, A074017, A074018, A074019, A074020, A074022, A074023.
Sequence in context: A190626 A191975 A074015 * A050862 A161632 A115974
Adjacent sequences: A074018 A074019 A074020 * A074022 A074023 A074024
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KEYWORD
| easy,nonn
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AUTHOR
| Frank Ruskey, Nate Kube (ruskey(AT)cs.uvic.ca), Aug 19 2002
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