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 A020449 Primes whose greatest digit is 1. 122
 11, 101, 10111, 101111, 1011001, 1100101, 10010101, 10011101, 10100011, 10101101, 10110011, 10111001, 11000111, 11100101, 11110111, 11111101, 100100111, 100111001, 101001001, 101001011, 101100011, 101101111, 101111011, 101111111 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes which are the sums of distinct powers of 10. - Amarnath Murthy, Nov 19 2002 Subsequence of A007088. - Michel Marcus, Dec 18 2015 These numbers are called Anti-Yarborough prime numbers in the Prime Pages Glossary (https://primes.utm.edu/glossary/page.php?sort=YarboroughPrime). - Randy L. Ekl, Jan 19 2019 LINKS Jon E. Schoenfield, Table of n, a(n) for n = 1..10000 (first 1000 terms from T. D. Noe) MAPLE N:= 10: # to get all entries with <= N digits S:= {}: for d from 1 to N-1 do   S:= S union select(isprime, map(`+`, map(convert, combinat[powerset]({seq(10^i, i=0..d-1)}), `+`), 10^d)); od: S; # if using Maple 11 or earlier, uncomment the next line # sort(convert(%, list)); # Robert Israel, May 04 2015 MATHEMATICA Flatten[Table[Select[FromDigits/@Tuples[{0, 1}, n], PrimeQ], {n, 9}]] (* Vincenzo Librandi, Jul 27 2012 *) PROG (MAGMA) [p: p in PrimesUpTo(101111111) | Set(Intseq(p)) subset [0, 1]]; // Vincenzo Librandi, Jul 27 2012 (PARI) is(n)=isprime(n)&&vecmax(digits(n))==1 \\ Charles R Greathouse IV, Jul 01 2013 (Python) from sympy import isprime A020449_list = [n for n in (int(format(m, 'b')) for m in range(1, 2**10)) if isprime(n)] # Chai Wah Wu, Dec 17 2015 CROSSREFS Cf. A007088, A036952. Sequence in context: A064490 A080439 A098153 * A089971 A082620 A199304 Adjacent sequences:  A020446 A020447 A020448 * A020450 A020451 A020452 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified May 29 06:31 EDT 2020. Contains 334697 sequences. (Running on oeis4.)