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 A104717 First terms in the rearrangements of integer numbers (see comments). 3
 1, 2, 3, 4, 1, 5, 6, 7, 1, 2, 8, 9, 1, 10, 3, 11, 1, 2, 12, 13, 1, 4, 14, 15, 1, 2, 16, 3, 1, 5, 17, 18, 1, 2, 19, 6, 1, 20, 4, 3, 1, 2, 21, 22, 1, 7, 23, 24, 1, 2, 25, 5, 1, 3, 8, 26, 1, 2, 4, 27, 1, 28, 9, 29, 1, 2, 3, 6, 1, 30, 31, 10, 1, 2, 32, 4, 1, 5, 3, 33, 1, 2, 34, 7, 1, 11, 35, 36, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Take the sequence of natural numbers: s0=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20, Move the first term s(1)=1 to 3*1=3 places to the right: s1=2,3,4,1,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20, Move the first term s(1)=2 to 3*2=6 places to the right: s2={3,4,1,5,6,7,2,8,9,10,11,12,13,14,15,16,17,18,19,20, Repeating the procedure we get successively: s3={4,1,5,6,7,2,8,9,10,3,11,12,13,14,15,16,17,18,19,20, s4={1,5,6,7,2,8,9,10,3,11,12,13,4,14,15,16,17,18,19,20, s5={5,6,7,1,2,8,9,10,3,11,12,13,4,14,15,16,17,18,19,20, s6={6,7,1,2,8,9,10,3,11,12,13,4,14,15,16,5,17,18,19,20, s7={7,1,2,8,9,10,3,11,12,13,4,14,15,16,5,17,18,19,6,20, ........................................................................ s100=1,5,39,3,2,40,13,41,42,4,43,9,14,7,44,45,46,6,15,47,10,48,49,16,8,50, 51,52,11,17,53,54,55,18,56,12,57,58,19,59,60,61,20,62,63,64,21,65,66,67,22, 68,69,70,23,71,72,73,24,74,75,76,25,77,78,79,26,80,81,82,27,83,84,85,28,86, 87,88,29,89,90,91,30,92,93,94,31,95,96,97,32,98,99,100,33,101,102,103,34, 104,105,106,35,107,108,109,36,110,111,112,37,113,114,115,38,116,117, The sequence A104717 gives the first terms in the rearrangements s0,s1,s2,...,s100. Cf. A104705, A104706 LINKS Table of n, a(n) for n=1..90. MATHEMATICA s=Range[200]; bb={1}; Do[s=Drop[Insert[s, s[[1]], 2+3 s[[1]]], 1]; bb=Append[bb, s[[1]]], {i, 100}]; bb CROSSREFS Cf. A104705, A104706. Sequence in context: A253028 A133108 A055441 * A067003 A277884 A117386 Adjacent sequences: A104714 A104715 A104716 * A104718 A104719 A104720 KEYWORD easy,nonn AUTHOR Zak Seidov, Mar 20 2005 STATUS approved

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Last modified July 13 11:43 EDT 2024. Contains 374282 sequences. (Running on oeis4.)