cp's OEIS Frontend

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.

A138898 Ratio of (2*n-1)! to number of zeros in lower part of Sylvester matrix for polynomial of degree n with all nonzero coefficients.

Table of values

n a(n)
3 60
4 840
5 30240
6 1995840
7 207567360
8 31135104000
9 6351561216000
10 1689515283456000
11 567677135241216000
12 235018333989863424000
13 117509166994931712000000
14 69800445194989436928000000
15 48581109855712648101888000000
16 39156374543704394370121728000000
17 36180490078382860397992476672000000
18 37989514582302003417892100505600000000
19 44979585265445572046784246998630400000000
20 59642930061980828534035911520183910400000000

List of values

[60, 840, 30240, 1995840, 207567360, 31135104000, 6351561216000, 1689515283456000, 567677135241216000, 235018333989863424000, 117509166994931712000000, 69800445194989436928000000, 48581109855712648101888000000, 39156374543704394370121728000000, 36180490078382860397992476672000000, 37989514582302003417892100505600000000, 44979585265445572046784246998630400000000, 59642930061980828534035911520183910400000000]

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

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