A195561 Hypotenuses of primitive Pythagorean triples in A195559 and A195560.

1, 5, 109, 289, 1009, 1189, 6485, 141481, 375121, 1309681, 1543321, 8417525, 183642229, 486906769, 1699964929, 2003229469, 10925940965, 238367471761, 632004611041, 2206553168161, 2600190307441, 14181862955045, 309400794703549

Offset

1,2

Comments

See A195500 for discussion and list of related sequences; see A195559 for Mathematica program.

Links

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

Formula

Empirical g.f.: -x*(x^9+x^8+x^7+5*x^6+109*x^5-1009*x^4-289*x^3-109*x^2-5*x-1) / (x^10-1298*x^5+1). - Colin Barker, Jun 04 2015

Crossrefs

Cf. A195500, A195559, A195560.

Sequence in context: A128110 A316755 A199307 * A142510 A195552 A318292

Adjacent sequences: A195558 A195559 A195560 * A195562 A195563 A195564

Keyword

nonn

Author

Clark Kimberling, Sep 21 2011

Status

approved