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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A073696 Initial members of groups in A073697. 2
2, 4, 6, 8, 16, 18, 20, 34, 50, 56, 68, 172, 174, 228, 230, 244, 260, 268, 270, 272, 296, 460, 462, 464, 486, 488, 498, 500, 510, 516, 662, 676, 678, 762, 806, 822, 824, 864, 880, 882, 884, 894, 906, 908, 932, 938 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(k+1)-a(k)=4 has no solutions.

LINKS

Table of n, a(n) for n=0..45.

MATHEMATICA

t = {}; s = 1; c = 0; Do[s = s*i; c += 1; If[PrimeQ[s + 1], AppendTo[t, i - 2*(c - 1)]; s = 1; c = 0], {i, 2, 1000, 2}]; t (* Jayanta Basu, Jul 07 2013 *)

CROSSREFS

Cf. A073695, A073697.

Sequence in context: A073935 A325764 A258119 * A058602 A133808 A160560

Adjacent sequences:  A073693 A073694 A073695 * A073697 A073698 A073699

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Aug 12 2002

EXTENSIONS

More terms from Felice Russo, Oct 11 2002

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 October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)