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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.

A239198 Expansion of -(3*x^5+sqrt(-7*x^2-6*x+1)*(3*x^4+5*x^3-11*x^2-7*x+2)-24*x^4-34*x^3+10*x^2+15*x-2) / (7*x^5+sqrt(-7*x^2-6*x+1)*(3*x^4+6*x^3-2*x^2+6*x-5)-15*x^4-12*x^3-12*x^2-19*x+3).

Table of values

n a(n)
1 1
2 3
3 13
4 67
5 377
6 2235
7 13701
8 85947
9 548209
10 3540851
11 23093885
12 151793203
13 1004023273
14 6675725867
15 44581355765
16 298829626795
17 2009477057761
18 13550281076451
19 91594501130989
20 620471833255971
21 4211165312423001

List of values

[1, 3, 13, 67, 377, 2235, 13701, 85947, 548209, 3540851, 23093885, 151793203, 1004023273, 6675725867, 44581355765, 298829626795, 2009477057761, 13550281076451, 91594501130989, 620471833255971, 4211165312423001]

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

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