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A109401 Number of primes in the first n terms of A109400. 1
0, 1, 1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 9, 10, 11, 11, 12, 13, 14, 15, 15, 16, 17, 17, 18, 19, 20, 21, 22, 23, 23, 24, 25, 25, 26, 26, 27, 28, 29, 30, 31, 32, 32, 33, 34, 34, 35, 35, 36, 37, 38, 39, 40, 41, 42, 43, 43, 44, 45, 45, 46, 46, 47, 47, 48, 49, 50, 51 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

a(n) = Sum(A010051(A109400(m)): 1<=m<=n).

LINKS

Table of n, a(n) for n=1..68.

CROSSREFS

Cf. A000720.

Sequence in context: A232748 A308936 A187737 * A307294 A280471 A172266

Adjacent sequences: A109398 A109399 A109400 * A109402 A109403 A109404

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 27 2005

STATUS

approved

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Last modified January 27 10:07 EST 2023. Contains 359838 sequences. (Running on oeis4.)