A081448 - OEIS

A081448

a(n) = sqrt( A081447(n) )/6.

1, 4, 1, 2, 2, 1, 1, 1, 2, 1, 2, 1, 2, 2, 1, 2, 1, 1, 3, 1, 3, 2, 5, 2, 4, 3, 4, 1, 2, 3, 5, 1, 7, 1, 1, 1, 2, 8, 1, 8, 3, 1, 2, 11, 2, 5, 5, 5, 6, 1, 1, 2, 3, 1, 2, 6, 4, 5, 7, 1, 7, 4, 7, 3, 2, 1, 2, 25, 6, 4, 2, 1, 7, 2, 1, 4, 4, 3, 1, 3, 2, 1, 10, 3, 5, 2, 1, 1, 1, 2, 4, 3, 2, 17, 9, 2, 9, 3, 9, 2

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OFFSET

1,2

COMMENTS

Partial maxima are in A081452.

LINKS

Table of n, a(n) for n=1..100.

PROG

(PARI) t=5; for(n=2, 100, for(k=1, 10^8, if(isprime(k^2+t), print1(k/6", "); t=t+k^2; break)))

CROSSREFS

Cf. A081447.

Sequence in context: A300657 A370120 A112621 * A322906 A106437 A279605

Adjacent sequences: A081445 A081446 A081447 * A081449 A081450 A081451

KEYWORD

nonn

AUTHOR

Ralf Stephan, Mar 21 2003

STATUS

approved