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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A187464 Number of 4X4 0..n arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric.

Original entry on oeis.org

144, 89618, 5098224, 100936174, 1061948616, 7706500654, 41131010240, 180898687166, 670434819776, 2192125079476, 6398465414348, 17262285779402
Offset: 1

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Author

R. H. Hardin Mar 10 2011

Keywords

Comments

Row 3 of A187462

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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