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A092612 Product of first n primes that end in 7. 1
7, 119, 4403, 206941, 13865047, 1344909559, 143905322813, 18275975997251, 2503808711623387, 393097967724871759, 65647360610053583753, 12932530040180555999341, 2935684319120986211850407 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200

EXAMPLE

a(1)= 7 = 7

a(2)= 7*17 = 119

a(3)= 7*17*37 = 4403

a(4)= 7*17*37*47 = 206941

MATHEMATICA

Rest[FoldList[Times, 1, Select[Prime[Range[50]], Mod[#, 10]==7&]]] (* Harvey P. Dale, Mar 01 2012 *)

FoldList[Times, Select[Prime[Range[50]], NumberDigit[#, 0]==7&]] (* Requires Mathematica version 12.3 or later *) (* Harvey P. Dale, May 27 2021 *)

CROSSREFS

Sequence in context: A192565 A171209 A296731 * A263943 A302718 A007751

Adjacent sequences:  A092609 A092610 A092611 * A092613 A092614 A092615

KEYWORD

nonn

AUTHOR

Jorge Coveiro, Apr 11 2004

STATUS

approved

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Last modified December 3 16:36 EST 2021. Contains 349467 sequences. (Running on oeis4.)