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A041000 If decimal expansion of n-th prime is x1 x2 ... xk, sort the xi into nonincreasing order, y1 y2 ... yk; then a(n) = |y1-y2-y3...-yk|. 4
2, 3, 5, 7, 0, 2, 6, 8, 1, 7, 2, 4, 3, 1, 3, 2, 4, 5, 1, 6, 4, 2, 5, 1, 2, 0, 2, 6, 8, 1, 4, 1, 3, 5, 4, 3, 1, 2, 0, 3, 1, 6, 7, 5, 1, 1, 0, 1, 3, 5, 2, 4, 1, 2, 0, 1, 1, 4, 2, 5, 3, 4, 4, 1, 1, 3, 1, 1, 0, 2, 1, 1, 2, 1, 1, 2, 2, 1, 3, 5, 4, 1, 0, 2, 2, 3, 1, 2, 1, 1, 3, 2, 3, 4, 4, 2, 4, 2, 0, 0, 2, 3, 2, 2, 1, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..106.

FORMULA

a(n)=|A007953(n)-2*A054055(n)|. [Charles R Greathouse IV, May 07, 2011]

EXAMPLE

a(397)=|9-7-3|=1.

MATHEMATICA

der[n_]:=Module[{c=Reverse[Sort[IntegerDigits[n]]]}, Abs[First[c]-Total[Rest[c]]]]; der/@Prime[Range[110]] (* Harvey P. Dale, Aug 15 2012 *)

CROSSREFS

Cf. A040164.

Sequence in context: A093339 A113566 A020775 * A042939 A185107 A115259

Adjacent sequences:  A040997 A040998 A040999 * A041001 A041002 A041003

KEYWORD

easy,nonn,base

AUTHOR

Felice Russo

EXTENSIONS

More terms from Michel ten Voorde

STATUS

approved

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Last modified May 18 21:55 EDT 2021. Contains 344003 sequences. (Running on oeis4.)