The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A084926 Inverse hyperbolic cotangent reducible numbers. The hyperbolic analog of the non-Stormer numbers (A002312). 2
 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 26, 27, 29, 31, 33, 34, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 56, 57, 59, 61, 63, 64, 65, 67, 69, 71, 73, 75, 76, 77, 79, 81, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 116, 117, 118 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS n is in the sequence if y=(xn+1)/(x+n) is an integer for some integer x where 1=(x*n+1), b=b+1)); if(b>0, print1(n, ", "))) CROSSREFS Cf. A002312 (non-Stormer numbers), A084925 (arccoth irreducible). Sequence in context: A097985 A099047 A174392 * A333038 A049013 A267872 Adjacent sequences:  A084923 A084924 A084925 * A084927 A084928 A084929 KEYWORD nonn AUTHOR Paul D. Hanna, Jun 12 2003 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.

Last modified August 9 22:03 EDT 2020. Contains 336326 sequences. (Running on oeis4.)