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Search: id:A072253
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| A072253 |
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Numbers n for which one step of the Collatz iteration (3n+1)/2^r gives rise to values 59,53,47,41,35,29,23,17,11 and 5 for r=1,3,5,..,19. |
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+0
1
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| 39, 141, 501, 1749, 5973, 19797, 62805, 185685, 480597, 873813
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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Appears to be ((118-12*n)*4^n-1)/3. - Don Reble (djr(AT)nk.ca), Oct 31 2005
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CROSSREFS
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Sequence in context: A118634 A044371 A044752 this_sequence A128826 A158593 A158598
Adjacent sequences: A072250 A072251 A072252 this_sequence A072254 A072255 A072256
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KEYWORD
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nonn,fini,full
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AUTHOR
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N. Rathankar (rathankar(AT)yahoo.com), Jul 08 2002
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EXTENSIONS
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Extended and edited by T. D. Noe (noe(AT)sspectra.com), Apr 10 2009
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