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Search: id:A136608
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| A136608 |
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(1/576)*number of ways to express n as the determinant of a 4 X 4 matrix with elements 1...16. |
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+0
3
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| 14392910, 1550244, 2188523, 2029381, 2828486, 1905576, 2901300, 1813327, 3097897, 2169409, 2695559, 1697839, 3767494, 1682771, 2548638, 2503246, 3286048, 1684275, 3093051, 1655317, 3500693, 2374117, 2403536, 1619568
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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0 can be expressed in a(0)*(4!)^2=8290316160 ways as the determinant of a 4 X 4 matrix which has elements 1...16. One such way is e.g. det ((1 2 3 4)(5 6 7 8)(9 10 11 12)(13 14 15 16))=0. All numbers between -38830 and +38830 can be expressed by such a determinant. The first number not expressible is given by A088216(4). The largest expressible number is given by A085000(4)=40800.
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LINKS
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Hugo Pfoertner, Table of n, a(n) for n = 0..40800
Hugo Pfoertner, Illustration of occurrence counts. (Zoom into diagram to see details)
Hugo Pfoertner, Illustration of occurrence counts. Upper range.
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EXAMPLE
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a(40800)=1 because the only 4X4 matrices with elements 1...16 with the determinant 40800 are the 576 combinations of determinant-preserving row and column permutations of ((16 6 4 9)(8 13 11 1)(3 12 5 14)(7 2 15 10)).
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CROSSREFS
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Cf. A088237 [numbers not expressible by 4X4 determinant], A088215, A088216, A085000, A136609.
Sequence in context: A034634 A014497 A111346 this_sequence A015364 A081640 A125565
Adjacent sequences: A136605 A136606 A136607 this_sequence A136609 A136610 A136611
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KEYWORD
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fini,nonn
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AUTHOR
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Hugo Pfoertner (hugo(AT)pfoertner.org), Jan 21 2008
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