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 A261997 a(n) = prime(n)! - prime(n!). 3
 0, 3, 107, 4951, 39916141, 6227015357, 355687428046967, 121645100408347963, 25852016738884971417571, 8841761993739701954543554805353, 8222838654177922817725562105174617 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) is prime for n = 2, 3, 4, 5, 7. LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..21 FORMULA a(n) = A039716(n) - A062439(n). log a(n) ~ n log^2 n. - Charles R Greathouse IV, Sep 08 2015 EXAMPLE For n=2, a(n) = prime(n)! - prime(n!) = prime(2)! - prime(2!) = 3. MATHEMATICA Array[Prime[#]! - Prime[#!] &, {11}] (* Michael De Vlieger, Sep 08 2015 *) PROG (PARI) vector(11, n, prime(n)! - prime(n!)) CROSSREFS Cf. A039716, A062439. Sequence in context: A094200 A003705 A146214 * A362056 A061308 A302060 Adjacent sequences: A261994 A261995 A261996 * A261998 A261999 A262000 KEYWORD nonn AUTHOR Altug Alkan, Sep 08 2015 STATUS approved

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)