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.
%I A088853 #17 Jul 13 2025 11:07:34 %S A088853 1,30,19375,304687500,119171142578125,1164078712463378906250, %T A088853 284213456325232982635498046875, %U A088853 1734719035084708593785762786865234375000,264697660491697295270796530530788004398345947265625,1009741855285318541798553204635879865236347541213035583496093750 %N A088853 Number of n X n matrices over GF(5) with characteristic polynomial x^(n-1) * (x-1). %H A088853 Irving Reiner, <a href="http://doi.org/10.1215/ijm/1255629830">On the number of matrices with given characteristic polynomial</a>, Illinois Journal of Mathematics, Vol. 5, No. 2 (1961), pp. 324-329. %F A088853 a(n) = (q/(q-1))*(q^(n^2-n)-q^(-2*n+n^2)) where q = 5. %t A088853 a[n_] := (5/4)*(5^(n^2-n) - 5^(n^2-2*n)); Array[a, 10] (* _Amiram Eldar_, Jul 13 2025 *) %Y A088853 Cf. A088668, A088671, A088852. %K A088853 nonn %O A088853 1,2 %A A088853 Yuval Dekel (dekelyuval(AT)hotmail.com) and _W. Edwin Clark_, Nov 29 2003 %E A088853 More terms from _Joerg Arndt_, Oct 04 2013