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 A163075 Primes of the form k\$ + 1. Here '\$' denotes the swinging factorial function (A056040). 5
 2, 3, 7, 31, 71, 631, 3433, 51481, 2704157, 280816201, 4808643121, 35345263801, 2104098963721, 94684453367401, 1580132580471901, 483701705079089804581, 6892620648693261354601, 410795449442059149332177041, 2522283613639104833370312431401 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Jinyuan Wang, Table of n, a(n) for n = 1..50 Peter Luschny, Die schwingende Fakultät und Orbitalsysteme, August 2011. Peter Luschny, Swinging Primes. EXAMPLE Since 3\$ = 4\$ = 6 the prime 7 is listed, however only once. MAPLE a := proc(n) select(isprime, map(x -> A056040(x)+1, [\$1..n])) end: MATHEMATICA Reap[Do[f = n!/Quotient[n, 2]!^2; If[PrimeQ[p = f + 1], Sow[p]], {n, 1, 70}]][[2, 1]] // Union (* _Jean-François Alcover_, Jun 28 2013 *) CROSSREFS Cf. A056040, A088332, A163077 (arguments k), A163074, A163076. Sequence in context: A008840 A268477 A156313 * A265113 A228171 A089359 Adjacent sequences: A163072 A163073 A163074 * A163076 A163077 A163078 KEYWORD nonn AUTHOR _Peter Luschny_, Jul 21 2009 EXTENSIONS More terms from _Jinyuan Wang_, Mar 22 2020 STATUS approved

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Last modified March 1 13:16 EST 2024. Contains 370433 sequences. (Running on oeis4.)