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A105980 Near-repdigit primes with 4 as repeated digit. 4
443, 449, 4441, 4447, 44449, 444443, 444449, 444444443, 4444444447, 44444444441, 444444444443, 44444444444444444447, 44444444444444444444444447, 4444444444444444444444444441, 444444444444444444444444444443 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..26

EXAMPLE

a(2)=449 is a term because all digits are equal to 4 except one.

MATHEMATICA

Select[Flatten[Table[FromDigits[PadLeft[{n}, x, 4]], {x, 3, 30}, {n, {1, 3, 7, 9}}]], PrimeQ] (* Harvey P. Dale, Feb 18 2018 *)

CROSSREFS

Sequence in context: A098256 A225350 A171392 * A031519 A031699 A158321

Adjacent sequences:  A105977 A105978 A105979 * A105981 A105982 A105983

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Apr 29 2005

EXTENSIONS

More terms from Harvey P. Dale, Feb 18 2018

STATUS

approved

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Last modified November 13 00:25 EST 2019. Contains 329083 sequences. (Running on oeis4.)