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A069598 Primes using only one nonzero digit (with zero digits allowed). 2
2, 3, 5, 7, 11, 101, 10111, 101111, 1011001, 1100101, 10010101, 10011101, 10100011, 10101101, 10110011, 10111001, 11000111, 11100101, 11110111, 11111101, 100100111, 100111001, 101001001, 101001011, 101100011, 101101111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

From the fifth term onwards only zeros and ones are used.

Any number composed only of a string of zeros and d's where d is a digit > 1 is divisible by d and not prime, so this sequence is the single-digit primes {2,3,5,7} UNION A020449.

The repunit primes (A004022) and A116692 are subsequences.

LINKS

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

CROSSREFS

Cf. A020449, A004022, A116692.

Sequence in context: A084837 A062352 A033938 * A049575 A070028 A084836

Adjacent sequences:  A069595 A069596 A069597 * A069599 A069600 A069601

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy, Mar 25 2002

EXTENSIONS

Edited by Rick L. Shepherd, Sep 04 2009

STATUS

approved

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Last modified March 28 14:24 EDT 2020. Contains 333089 sequences. (Running on oeis4.)