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A098393 Prime(n)+Log2(Log2(prime(n))), where Log2=A000523. 3
2, 3, 6, 8, 12, 14, 19, 21, 25, 31, 33, 39, 43, 45, 49, 55, 61, 63, 69, 73, 75, 81, 85, 91, 99, 103, 105, 109, 111, 115, 129, 133, 139, 141, 151, 153, 159, 165, 169, 175, 181, 183, 193, 195, 199, 201, 213, 225, 229, 231, 235, 241, 243, 253, 260, 266, 272, 274, 280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A000040(n) + A098391(n).

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

a(10) = A000040(10) + A098391(10) = 29 + 2 = 31.

MATHEMATICA

#+Floor[Log[2, Floor[Log[2, #]]]]&/@Prime[Range[60]] (* Harvey P. Dale, May 07 2017 *)

CROSSREFS

Cf. A098389, A014688, A098387, A098390.

Sequence in context: A140496 A308843 A086552 * A263883 A103567 A277913

Adjacent sequences:  A098390 A098391 A098392 * A098394 A098395 A098396

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 06 2004

STATUS

approved

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Last modified August 6 11:55 EDT 2020. Contains 336246 sequences. (Running on oeis4.)