|
| |
|
|
A156307
|
|
Primes where the first digit equals the sum of all the other digits.
|
|
3
|
|
|
|
11, 101, 211, 431, 523, 541, 743, 761, 853, 2011, 4013, 4211, 5023, 5113, 7043, 7151, 7331, 8017, 8053, 8161, 8233, 8431, 8521, 20011, 20101, 21001, 40013, 40031, 41201, 42101, 50023, 50131, 50221, 50311, 51031, 52021, 52201, 53101, 54001, 70061, 70223, 70241, 70313, 71411, 72221, 73013, 73121, 74021, 74201, 75011, 76001, 80071, 80107, 80233, 80251, 80341, 80611, 80701
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
There is no term that begins with 3, 6 or 9. - Bernard Schott, Feb 16 2020
|
|
|
LINKS
|
Daniel Starodubtsev, Table of n, a(n) for n = 1..1000
|
|
|
EXAMPLE
|
4211 is a prime where the first digit equals the sum of all the other digits.
|
|
|
MATHEMATICA
|
ferQ[n_]:=Module[{idn=IntegerDigits[n]}, First[idn]==Total[Rest[idn]]]; Select[Prime[Range[8000]], ferQ] (* Harvey P. Dale, Jun 22 2011 *)
|
|
|
CROSSREFS
|
Cf. A000040.
Sequence in context: A180406 A174884 A121402 * A057532 A193699 A001603
Adjacent sequences: A156304 A156305 A156306 * A156308 A156309 A156310
|
|
|
KEYWORD
|
nonn,base
|
|
|
AUTHOR
|
Parthasarathy Nambi, Feb 07 2009
|
|
|
EXTENSIONS
|
Corrected and extended by Zak Seidov, Feb 08 2009
|
|
|
STATUS
|
approved
|
| |
|
|
