A269327 - OEIS

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A269327

a(n) = 7^prime(n).

49, 343, 16807, 823543, 1977326743, 96889010407, 232630513987207, 11398895185373143, 27368747340080916343, 3219905755813179726837607, 157775382034845806615042743, 18562115921017574302453163671207, 44567640326363195900190045974568007

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

FORMULA

a(n) = 7^A000040(n).

Sum_{n>=1} 1/a(n) = A132822. - Amiram Eldar, Aug 11 2020

EXAMPLE

The second prime is 3, hence a(2) = 7^3 = 343.

The third prime is 5, hence a(3) = 7^5 = 16807.

MAPLE

A269327:=n->7^ithprime(n): seq(A269327(n), n=1..20); # Wesley Ivan Hurt, Mar 07 2016

MATHEMATICA

7^Prime[Range[20]] (* Alonso del Arte, Feb 23 2016 *)

PROG

(Magma) [7^p: p in PrimesUpTo(45)]; // Vincenzo Librandi, Feb 25 2016

(PARI) a(n) = 7^prime(n); \\ Altug Alkan, Mar 04 2016

CROSSREFS

Cf. A000040, A000420, A034785, A053810, A057901, A057902, A132822.

Sequence in context: A211756 A036323 A066429 * A206255 A017606 A206248

Adjacent sequences: A269324 A269325 A269326 * A269328 A269329 A269330

KEYWORD

nonn,easy

AUTHOR

Emre APARI, Feb 23 2016

STATUS

approved