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A257572 Prime root of n-th term in A257278. 4
2, 2, 2, 3, 2, 2, 3, 2, 3, 2, 2, 3, 2, 2, 3, 5, 2, 3, 2, 5, 2, 3, 2, 3, 2, 5, 2, 3, 2, 5, 2, 3, 7, 2, 3, 5, 2, 2, 3, 7, 2, 5, 3, 2, 2, 7, 3, 5, 2, 3, 2, 5, 2, 7, 3, 2, 2, 3, 5, 7, 2, 3, 2, 5, 2, 3, 7, 2, 5, 3, 2, 2, 3, 7, 2, 5, 2, 3, 11, 2, 7, 5, 3, 2, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A020639(A257278(n));

A257278(n) = a(n) ^ A257573(n);

a(n) <= A257573(n) by definition of A257278.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a257572 = a020639 . a257278

CROSSREFS

Cf. A257278, A020639, A025473, A257573.

Sequence in context: A290839 A085694 A258570 * A160493 A053760 A223942

Adjacent sequences:  A257569 A257570 A257571 * A257573 A257574 A257575

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 01 2015

STATUS

approved

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Last modified April 24 16:06 EDT 2019. Contains 322430 sequences. (Running on oeis4.)