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A277063 Number of primes <= n-th Bell number. 2
0, 0, 1, 3, 6, 15, 46, 151, 570, 2376, 10961, 54941, 297220, 1720725, 10602541, 69176095, 475881437, 3439093081, 26026621617, 205694058211, 1693554793730, 14494778231067, 128711956613875, 1183763037547762, 11258075170582653, 110558809039675629, 1119649516271861536 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..26.

FORMULA

a(n) = A000720(A000110(n)). - Michel Marcus, Nov 10 2016

MATHEMATICA

Table[PrimePi[BellB[n]], {n, 0, 20}]

PROG

(MAGMA) [#PrimesUpTo(Bell(n)): n in [0..14]];

CROSSREFS

Cf. A000110, A054782, A277062.

Sequence in context: A056382 A028401 A005655 * A051169 A051610 A322851

Adjacent sequences:  A277060 A277061 A277062 * A277064 A277065 A277066

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Nov 10 2016

EXTENSIONS

a(21)-a(26) from Charles R Greathouse IV, Nov 10 2016

STATUS

approved

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Last modified March 18 17:51 EDT 2019. Contains 321292 sequences. (Running on oeis4.)