A081446 a(n) = sqrt( A081445(n) )/6.

1, 1, 2, 1, 3, 3, 1, 1, 1, 2, 2, 2, 1, 1, 1, 5, 5, 5, 3, 5, 1, 3, 1, 3, 4, 3, 2, 1, 3, 1, 4, 2, 8, 4, 1, 2, 5, 3, 2, 4, 3, 5, 1, 2, 5, 9, 2, 9, 1, 4, 5, 7, 3, 2, 6, 1, 1, 2, 4, 3, 2, 1, 1, 2, 2, 3, 4, 1, 2, 1, 2, 5, 8, 4, 4, 4, 7, 1, 5, 8, 3, 1, 5, 8, 1, 3, 7, 4, 3, 6, 3, 5, 1, 4, 2, 4, 2, 1, 1, 5, 2, 1

Offset

1,3

Comments

Partial maxima are in A081451.

Links

Table of n, a(n) for n=1..102.

Prog

(PARI) t=11; for(n=2, 100, for(k=1, 10^8, if(isprime(k^2+t), print1(k/6", "); t=t+k^2; break)))

Crossrefs

Cf. A081445.

Sequence in context: A375479 A212634 A162883 * A274309 A374630 A158440

Adjacent sequences: A081443 A081444 A081445 * A081447 A081448 A081449

Keyword

nonn

Author

Ralf Stephan, Mar 21 2003

Status

approved