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A199692 Subsequence of Pythagorean primes (A002144): each square is used only once. 1
5, 41, 73, 149, 157, 277, 313, 613, 617, 709, 929, 1117, 1201, 1741, 1753, 1873, 2381, 2897, 2969, 3469, 3613, 3637, 3697, 4513, 4597, 5101, 5953, 6173, 6857, 6869, 7577, 8089, 8581, 9661, 10369, 10513, 11717, 12097, 12653, 12973, 13001, 13649, 14461, 15313 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Zak Seidov, Table of n, a(n) for n = 1..2000

EXAMPLE

First Pythagorean prime A002144(1)=5=1+4, "uses" squares 1^2 and 2^2.

Next Pythagorean prime which does not "use" 1^2 and 2^2 is A002144(6)=41=4^2+5^2, hence a(2)=41.

Next Pythagorean prime which does not "use" 1^2, 2^2, 4^2 and 5^2 is A002144(9)=73=3^2+8^2, hence a(3)=73.

Next Pythagorean prime which does not "use" 1^2, 2^2, 3^2, 4^2, 5^2 and 8^2 is A002144(16)=149=7^2+10^2, hence a(4)=149.

CROSSREFS

Cf. A002144.

Sequence in context: A106963 A276916 A203018 * A031917 A139846 A201718

Adjacent sequences:  A199689 A199690 A199691 * A199693 A199694 A199695

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 09 2011

STATUS

approved

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Last modified December 9 08:41 EST 2021. Contains 349627 sequences. (Running on oeis4.)