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A275531
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Values taken by the sum of numbers in Collatz trajectory (A033493), sorted into ascending order.
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1
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1, 3, 7, 15, 31, 36, 46, 49, 55, 63, 66, 67, 91, 106, 119, 127, 139, 145, 148, 186, 190, 197, 214, 235, 248, 255, 259, 274, 281, 288, 301, 302, 316, 325, 330, 339, 346, 357, 386, 393, 399, 413, 427, 442, 442, 452, 465, 497, 498, 500, 505, 509, 511, 519, 535, 540
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OFFSET
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1,2
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COMMENTS
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Values a(n) such that a(n) = a(n+1): 442, 609, 633, 724, 904, 925, ...
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LINKS
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Table of n, a(n) for n=1..56.
Eric Weisstein's World of Mathematics, Collatz Problem
Wikipedia, Collatz conjecture
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PROG
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(MAGMA) Sort([&+[k eq 1 select n else IsOdd(Self(k-1)) and not IsOne(Self(k-1)) select 3*Self(k-1)+1 else Self(k-1) div 2: k in [1..5*n]]: n in [1..2^10] | &+[k eq 1 select n else IsOdd(Self(k-1)) and not IsOne(Self(k-1)) select 3*Self(k-1)+1 else Self(k-1) div 2: k in [1..5*n]] le 2^10])
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CROSSREFS
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Cf. A033493, A275532.
Sequence in context: A090633 A320024 A098583 * A275532 A212315 A043729
Adjacent sequences: A275528 A275529 A275530 * A275532 A275533 A275534
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KEYWORD
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nonn
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AUTHOR
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Jaroslav Krizek, Jul 31 2016
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STATUS
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approved
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