login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A259391 Numbers n such that A258881(n+k) is prime for k=0,...,9; where A258881(x) = x + sum of the square of the digits of x (A003132). 2
10, 1761702690, 7226006660, 16453361570, 95748657190, 104217487100, 111058349320, 141665059420, 168759510430, 177313689280, 177313689330, 178209124090, 188343072120, 347296044930, 347296045010, 381449093790, 381449093840, 445151776780, 491570264380 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms computed by G. Resta, cf. link to Prime Puzzle 776.

LINKS

Table of n, a(n) for n=1..19.

C. Riviera, Puzzle 776. Ten consecutive integers such that..., PrimePuzzles.net, March 2015.

EXAMPLE

For n = 10, A258881(10) = 10 + 1^2 + 0^2 = 11, A258881(11) = 11 + 1^2 + 1^2 = 13, A258881(12) = 12 + 1^2 + 2^2 = 17, ..., A258881(19) = 19 + 1^2 + 9^2 = 101 are all prime, therefore a(1) = 10.

The next value of 10 in A259567 occurs at index n = 1761702690 = a(2).

CROSSREFS

Cf. A003132, A258881, A259567.

Sequence in context: A057141 A034249 A131679 * A279540 A321538 A321803

Adjacent sequences:  A259388 A259389 A259390 * A259392 A259393 A259394

KEYWORD

nonn,base

AUTHOR

M. F. Hasler, Jul 19 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 18 08:57 EDT 2019. Contains 326077 sequences. (Running on oeis4.)