This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A073323 Smallest x such that A073259[x]=n; the first number of which length of fixed-point-list terminated by x-th composite number equals n. 0
 0, 0, 4, 1, 29, 153, 4913, 73114, 1985627 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Occurrences of lengths [1-10] for n<=10000000 are {0,0,64,4662,310495,6468633,3041909,173579,658,0}. LINKS FORMULA a(n)=Min{x; A073259[x]=n} EXAMPLE For lengths n=3, 4, 5, 6, 7, 8 the corresponding lists are: {4, 7, 9}, {1, 2, 3, 4}, {29, 40, 42, 43, 44}, {153, 190, 196, 198, 199, 200}, {4913, 5570, 5649, 5656, 5658, 5659, 5660} and {73114, 80343, 80982, 81039, 81046, 81048, 81049, 81050}. MATHEMATICA lfp[x_] := Length[FixedPointList[x + PrimePi[ # ] + 1 &, x]]-1 t=Table[0, {15}]; Do[s=lfp[n]; If[s<16&&t[[s]]==0, t[[s]]=n], {n, 1, 100000}]; t CROSSREFS Cf. A002808, A073259, A073320-A073322. Sequence in context: A114150 A134149 A035469 * A077097 A190647 A123126 Adjacent sequences:  A073320 A073321 A073322 * A073324 A073325 A073326 KEYWORD more,nonn AUTHOR Labos E. (labos(AT)ana.sote.hu), Jul 29 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .