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A083975 Smallest palindromic prime containing exactly n 4's. 9
11411, 14341, 1464641, 1447441, 1444441, 144404441, 14244444241, 34444344443, 74444444447, 1444447444441, 3444444444443, 144444454444441, 14144444444444141, 34444444044444443, 1414444444444444141, 1444444447444444441, 104444444444444444401 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..500

MATHEMATICA

Table[d = 4; i = 1;

While[ x = IntegerDigits[Prime[i]];

  x != Reverse[x] || Count[x, d] != n , i++];

FromDigits[x], {n, 1, 6}]  (* Robert Price, Mar 25 2019 *)

CROSSREFS

Cf. A083972, A083973, A083975, A083976, A083977, A083978, A083979, A083980, A083981.

Sequence in context: A235016 A185768 A082440 * A157655 A262399 A115753

Adjacent sequences:  A083972 A083973 A083974 * A083976 A083977 A083978

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 21 2003

EXTENSIONS

More terms from Ray G. Opao, Sep 20 2004

Corrected and extended by Giovanni Resta, Feb 08 2006

STATUS

approved

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Last modified June 25 18:38 EDT 2022. Contains 354851 sequences. (Running on oeis4.)