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 A104705 First terms in the rearrangements of integer numbers (see comments). 5
 1, 2, 3, 1, 4, 2, 1, 5, 6, 1, 2, 3, 1, 7, 2, 1, 8, 4, 1, 2, 3, 1, 9, 2, 1, 10, 11, 1, 2, 3, 1, 12, 2, 1, 4, 5, 1, 2, 3, 1, 13, 2, 1, 14, 6, 1, 2, 3, 1, 4, 2, 1, 15, 16, 1, 2, 3, 1, 17, 2, 1, 18, 4, 1, 2, 3, 1, 5, 2, 1, 7, 19, 1, 2, 3, 1, 20, 2, 1, 4, 8, 1, 2, 3, 1, 6, 2, 1, 21, 22, 1, 2, 3, 1, 4, 2, 1, 5, 23 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Take the sequence of natural numbers: s0=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, Move the first term s(1)=1 to prime[s(1)]=2 places to the right: s1=2,3,1,4,5,6,7,8,9,10,11,12,13,14,15,16, Move the first term s(1)=2 to prime[s(1)]=3 places to the right: s2=3,1,4,2,5,6,7,8,9,10,11,12,13,15,16, Repeating the procedure we get successively: s3=1,4,2,5,6,3,7,8,9,10,11,12,13,15,16, s4=4,2,1,5,6,3,7,8,9,10,11,12,13,15,16, s5=2,1,5,6,3,7,8,4,9,10,11,12,13,15,16, s6=1,5,6,2,3,7,8,4,9,10,11,12,13,15,16, s7=5,6,1,2,3,7,8,4,9,10,11,12,13,15,16, s8=6,1,2,3,7,8,4,9,10,11,12,5,13,15,16, .................................................................. s100=2,3,1,24,9,4,25,26,27,6,5,7,28,29,30,10,8,31,32,11,33,34,35,36, 37,38,12,39,40,41,42,13,43,44,14,45,46,47,48,15,49,50,51,52,53,54, 16,55,56,57,58,59,60,17,61,62,18,63,64,65,66,67,68,19,69,70,71,72, 20,73,74,21,75,76,77,78,79,80,22,81,82,83,84,23,85,86,87,88,89,90, The sequence A104705 gives the first terms in the rearrangements s0,s1,s2,...,s100. LINKS MATHEMATICA s=Range[100]; bb={1}; Do[s=Drop[Insert[s, s[[1]], 2+Prime[s[[1]]]], 1]; bb=Append[bb, s[[1]]], {i, 100}]; bb CROSSREFS Sequence in context: A087088 A255250 A273620 * A143361 A152547 A083906 Adjacent sequences:  A104702 A104703 A104704 * A104706 A104707 A104708 KEYWORD easy,nonn AUTHOR Zak Seidov, Mar 19 2005 STATUS approved

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Last modified October 23 08:57 EDT 2019. Contains 328345 sequences. (Running on oeis4.)