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A201278 a(n) specifies the quadratic extension sqrt(a(n)) for A201047(n). 6
10, 2, 2, 5, 5, 130, 185, 5, 2, 2, 10, 10, 5, 5, 10, 17, 17, 5, 5, 5, 53, 53, 13, 13, 1490, 5, 2, 2, 5, 1565, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture (JasiƄski): The numbers in this sequence are multiplicative combinations of: primes congruent to 1 or 2 modulo 4 (A002313), Pythagorean primes (A002144), the number 2, and norms of Gaussian primes A055025.

LINKS

Table of n, a(n) for n=1..31.

CROSSREFS

Cf. A200216, A200656, A201047.

Sequence in context: A136712 A138999 A265994 * A232589 A010175 A323421

Adjacent sequences:  A201275 A201276 A201277 * A201279 A201280 A201281

KEYWORD

nonn,more

AUTHOR

Artur Jasinski, Nov 29 2011

EXTENSIONS

Minor edits by N. J. A. Sloane, Feb 23 2014

STATUS

approved

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Last modified February 27 08:13 EST 2020. Contains 332300 sequences. (Running on oeis4.)