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A116692 Primes with only one distinct decimal digit. 3
2, 3, 5, 7, 11, 1111111111111111111, 11111111111111111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes in A010785 (repdigit numbers). Union of single-digit primes and A004022 (repunit primes). A004023 shows that the next term is 317 1's. The Mersenne primes (A000668) are the binary analog (i.e., bits are all 1's).

REFERENCES

Clifford A. Pickover, A Passion for Mathematics (2005) at 60, 297.

LINKS

Table of n, a(n) for n=1..7.

CROSSREFS

A004022 is a subsequence.

Cf. A004023, A010785, A000668.

Sequence in context: A091689 A046482 A046941 * A114983 A118950 A092620

Adjacent sequences:  A116689 A116690 A116691 * A116693 A116694 A116695

KEYWORD

base,easy,nonn

AUTHOR

Rick L. Shepherd, Feb 22 2006

EXTENSIONS

Reference provided by Harvey P. Dale, Apr 19 2014

STATUS

approved

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Last modified January 28 00:32 EST 2020. Contains 331313 sequences. (Running on oeis4.)