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A195572 Numerators b(n) of Pythagorean approximations b(n)/a(n) to 1/5. 3
0, 9, 11, 20, 819, 1221, 2020, 83629, 124431, 206040, 8529239, 12690841, 21014040, 869898849, 1294341251, 2143226060, 88721153259, 132010116861, 218588044060, 9048687733669, 13463737578471, 22293837268080, 922877427680879 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A195500 for discussion and list of related sequences; see A195571 for Mathematica program.

LINKS

Table of n, a(n) for n=1..23.

FORMULA

Empirical g.f.: -x^2*(x^7-x^6-110*x^4+90*x^3-20*x^2-11*x-9) / (x^9-101*x^6-101*x^3+1). - Colin Barker, Jun 04 2015

CROSSREFS

Cf. A195500, A195571, A195573.

Sequence in context: A329279 A284295 A284294 * A046259 A258452 A299250

Adjacent sequences:  A195569 A195570 A195571 * A195573 A195574 A195575

KEYWORD

nonn

AUTHOR

Clark Kimberling, Sep 21 2011

STATUS

approved

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Last modified April 6 12:08 EDT 2020. Contains 333273 sequences. (Running on oeis4.)