A004203 - OEIS

A004203

Numbers n such that 54*10^n + 1 is prime.

1, 3, 5, 11, 47, 79, 275, 839, 1877, 3399, 5371, 6671, 30659, 43575 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`No more terms through 10^5.`
	LINKS	`Table of n, a(n) for n=1..14.`
	PROG	`(PARI) is(n)=ispseudoprime(54*10^n+1) \\ Charles R Greathouse IV, Jun 13 2017`
	CROSSREFS	`Sequence in context: A059242 A175173 A268510 * A201473 A088884 A328381` `Adjacent sequences: A004200 A004201 A004202 * A004204 A004205 A004206`
	KEYWORD	`nonn`
	AUTHOR	`R. K. Guy`
	EXTENSIONS	`a(1)-a(9) computed by Cletus Emmanuel (cemmanu(AT)uvi.edu) and Richard Pinch` `a(10)-a(14) from Cletus Emmanuel (cemmanu(AT)yahoo.com), submitted by Ray Chandler, Feb 15 2005`
	STATUS	`approved`

Last modified January 29 15:06 EST 2023. Contains 359923 sequences. (Running on oeis4.)