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A205711 Positions of multiples of 9 in A204890 (differences of primes). 1
7, 31, 37, 41, 51, 63, 69, 75, 82, 92, 96, 101, 112, 123, 129, 133, 140, 150, 159, 164, 178, 187, 198, 202, 214, 224, 228, 232, 236, 241, 246, 260, 269, 273, 280, 290, 294, 298, 301, 305, 310, 315, 323, 331, 336, 344, 358, 367, 371, 375, 386, 390 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For a guide to related sequences, see A205558.

LINKS

Table of n, a(n) for n=1..52.

EXAMPLE

In A204890=(1,3,2,5,4,2,9,8,6,4,11,10,8,...), multiples of 9 are in positions 7,31,37,...  See the example at A205712.

MATHEMATICA

(See the program at A205712.)

With[{prs=Prime[Range[30]]}, Flatten[Position[Flatten[Table[prs[[n]]- Take[ prs, n-1], {n, 2, Length[prs]}]], _?(Divisible[#, 9]&)]]] (* Harvey P. Dale, Dec 01 2013 *)

CROSSREFS

Cf. A204890, A205712, A205558.

Sequence in context: A184121 A167768 A103630 * A040064 A241101 A238664

Adjacent sequences:  A205708 A205709 A205710 * A205712 A205713 A205714

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 31 2012

STATUS

approved

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Last modified August 24 03:51 EDT 2019. Contains 326260 sequences. (Running on oeis4.)