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 A182374 Primes of the form n*3^n + 1. 0
 19, 52489, 59296646043258913, 3140085798164163223281069127, 281013956365219695455558985684629594690518822413326510467 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Similar to A060353, and to the Woodall primes A050918. LINKS EXAMPLE 19 = 2*3^2 + 1; 52489 = 8*3^8 + 1; a(3) = 32*3^32 + 1; a(4) = 54*3^54 + 1. MAPLE #choose N large, then S is the desired set f:=n->n*3^n + 1: S:={}: for n from 0 to N do if(isprime(f(n))) then S:=S union {f(n)}: fi: od MATHEMATICA Select[Table[n*3^n + 1, {n, 0, 580}], PrimeQ] (* Jayanta Basu, Jun 01 2013 *) CROSSREFS Cf. A060353, A050918. Sequence in context: A068734 A216529 A145851 * A034207 A098970 A172751 Adjacent sequences:  A182371 A182372 A182373 * A182375 A182376 A182377 KEYWORD nonn AUTHOR Patrick Devlin, Apr 26 2012 STATUS approved

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Last modified May 17 22:15 EDT 2021. Contains 343992 sequences. (Running on oeis4.)