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A106100 Primes with maximal digit = 2. 8
2, 211, 1021, 1201, 2011, 2111, 2221, 10211, 12011, 12101, 12211, 20011, 20021, 20101, 20201, 21001, 21011, 21101, 21121, 21211, 21221, 22111, 101021, 101221, 102001, 102101, 102121, 110221, 111121, 111211, 112111, 112121, 120011, 120121 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Subsequence of A036953. Prime numbers p such that A209928(p) = 2. Complement of A221698 with respect to A221697. [Jaroslav Krizek, Jan 22 2013]
LINKS
MAPLE
N:= 6: # to get all terms of up to N digits
M2:= {1}; M1:= {1}:
for d from 1 to N-1 do
M2:= map(t -> (t, t+10^d, t+2*10^d), M2);
M1:= map(t -> (t, t+10^d), M1);
od:
sort(convert({2} union select(isprime, M2 minus M1), list)); # Robert Israel, Jun 19 2016
MATHEMATICA
Select[Prime[Range[10000]], Max[IntegerDigits[ # ]]==2&]
PROG
(PARI) isok(p) = isprime(p) && (vecmax(digits(p)) == 2); \\ Michel Marcus, Jan 02 2019
CROSSREFS
Sequence in context: A050445 A167833 A167838 * A167839 A107612 A068814
KEYWORD
nonn,base
AUTHOR
Zak Seidov, May 07 2005
EXTENSIONS
More terms from Rick L. Shepherd, May 22 2005
STATUS
approved

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Last modified June 14 13:49 EDT 2024. Contains 373400 sequences. (Running on oeis4.)