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Search: id:A052269
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| A052269 |
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Number of n X n matrices over GF(3) under row and column permutations. |
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+0
4
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| 1, 3, 27, 738, 90492, 64796982, 302752867740, 9610448114487414, 2130536585704570302966, 3379836486315342147630795474, 39197947672609240635681299333726499
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OFFSET
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0,2
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FORMULA
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a(n) = sum {1*s_1+2*s_2+...=n, 1*t_1+2*t_2+...=n} (fix A[s_1, s_2, ...;t_1, t_2, ...]/(1^s_1*s_1!*2^s_2*s_2!*...*1^t_1*t_1!*2^t_2*t_2!*...)) where fix A[...] = 3^sum {i, j>=1} (gcd(i, j)*s_i*t_j) - Christian G. Bower (bowerc(AT)usa.net), Dec 18 2003
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CROSSREFS
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Cf. A002724, A052271, A052272, A091060.
Sequence in context: A113100 A038379 A047656 this_sequence A138525 A012505 A085521
Adjacent sequences: A052266 A052267 A052268 this_sequence A052270 A052271 A052272
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KEYWORD
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nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 04 2000
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