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A105667
1/(2k)th of area of primitive Pythagorean triangle with hypotenuse 5^(2^n), where k is the product of all Mersenne primes not exceeding 2^(n+2)  1.
0
1, 2, 4216, 44834576
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..3.
F. Barnes,
Divisors of primitive Pythagorean triangles when the hypotenuse is to a power
CROSSREFS
Cf.
A066770
;
A066771
;
A098918
.
Sequence in context:
A342295
A114722
A135959
*
A178410
A067668
A292391
Adjacent sequences:
A105664
A105665
A105666
*
A105668
A105669
A105670
KEYWORD
more
,
nonn
AUTHOR
Lekraj Beedassy
, May 04 2005
STATUS
approved
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Last modified May 26 03:59 EDT 2024. Contains 372807 sequences. (Running on oeis4.)