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A042939 Absolute values between digits of primes. 5
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, 3, 8, 3, 9, 11, 12, 5, 11, 8, 12, 9, 15, 8, 9, 11, 15, 17, 0, 3, 7, 9, 4, 10, 3, 4, 10, 7, 13, 6, 12, 7, 9, 10, 4, 1, 1, 5, 1, 7, 8, 10, 5, 11, 10, 7, 13, 8, 14, 13, 3, 5, 6, 1, 0, 2, 8, 3, 9, 8, 3, 5, 9, 12, 11, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = absolute difference between the first digit of prime(n) and the sum of the other digits of prime (n). [Harvey P. Dale, Mar 11 2012]

LINKS

James Spahlinger, Table of n, a(n) for n = 1..10000

FORMULA

If decimal expansion of n-th prime is x1 x2 x3......xk then a(n)=|x1-x2-x3.......-xk|

a(n) = A040997(A000040(n)). - Reinhard Zumkeller, Oct 10 2012

MATHEMATICA

ddp[n_]:=Module[{idn=IntegerDigits[n]}, Abs[First[idn]-Total[Rest[idn]]]]; ddp/@Prime[Range[100]] (* Harvey P. Dale, Mar 11 2012 *)

PROG

(Haskell)

a042939 = a040997 . a000040

-- Reinhard Zumkeller, Oct 10 2012

CROSSREFS

Cf. A041000, A040164, A000040.

Cf. A007605.

Sequence in context: A113566 A020775 A041000 * A185107 A115259 A039709

Adjacent sequences:  A042936 A042937 A042938 * A042940 A042941 A042942

KEYWORD

base,nonn

AUTHOR

Felice Russo

STATUS

approved

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Last modified May 6 13:04 EDT 2021. Contains 343585 sequences. (Running on oeis4.)