A201278 - OEIS

A201278

a(n) specifies the quadratic extension sqrt(a(n)) for A201047(n).

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

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OFFSET

1,1

COMMENTS

Conjecture (Jasiński): 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: A138999 A351306 A265994 * A232589 A010175 A363839

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