This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A253897 Numbers n such that the sequence A127644 with a(1) = n is conjectured to give a permutation of the natural numbers. 1
 3, 4, 5, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 28, 30, 33, 35, 36, 39, 40, 44, 45, 48, 50, 55, 56, 60, 63, 66, 70, 72, 75, 77, 78, 80, 84, 88, 90, 91, 99, 102, 104, 105, 108, 112, 117, 120, 126, 130, 132, 135, 140, 144, 150, 154, 160, 165, 168, 176, 180, 182, 195, 198, 208 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A127644 for more information. LINKS EXAMPLE a(1) = 3 because A127644 is conjectured to be a permutation of the natural numbers. PROG (PARI) b(r)=v=[r]; n=1; while(n<100, p=prod(i=1, #v, v[i]); if(p*n\(vecsum(v)+n)==p*n/(vecsum(v)+n)&&!vecsearch(vecsort(v), n), v=concat(v, n); n=0); n++); #v r=1; while(r<500, if(b(r)>50, print1(r, ", ")); r++) CROSSREFS Cf. A127644, A252984. Sequence in context: A039095 A001957 A184484 * A100966 A063977 A290136 Adjacent sequences:  A253894 A253895 A253896 * A253898 A253899 A253900 KEYWORD nonn AUTHOR Derek Orr, Jan 17 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.

Last modified August 24 22:41 EDT 2019. Contains 326314 sequences. (Running on oeis4.)