A156753 - OEIS

A156753

Primes whose largest digit is equal to the sum of all the other digits.

11, 101, 167, 211, 257, 347, 431, 523, 541, 617, 743, 761, 853, 1021, 1087, 1153, 1201, 1373, 1427, 1483, 1531, 1571, 1607, 1733, 1861, 2011, 2053, 2141, 2237, 2251, 2273, 2383, 2411, 2417, 2503, 2521, 2741, 2833, 2851, 3041, 3137, 3371, 3407, 3511, 3823

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Chris Caldwell, The First 1,000 Primes

EXAMPLE

1571 is a prime in which the largest digit is equal to the sum of all the other digits.

MAPLE

A054055 := proc(n) max(op(convert(n, base, 10))) ; end: A007953 := proc(n) add(d, d=convert(n, base, 10)) ; end: for n from 1 to 800 do p := ithprime(n) ; if 2*A054055(p) = A007953(p) then printf("%d, ", p) ; fi; od: # R. J. Mathar, Feb 20 2009

MATHEMATICA

ldQ[n_]:=Module[{c=Sort[IntegerDigits[n]]}, Total[Most[c]]==Last[c]]; Select[ Prime[Range[1000]], ldQ] (* Harvey P. Dale, Dec 26 2013 *)

CROSSREFS

Cf. A000040.

Sequence in context: A083144 A058411 A134462 * A118592 A156617 A168536

Adjacent sequences: A156750 A156751 A156752 * A156754 A156755 A156756

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, Feb 14 2009

EXTENSIONS

11 added in front and extended by R. J. Mathar, Feb 20 2009

STATUS

approved