

A066904


Triangular numbers in A006577.


1



1, 3, 6, 15, 15, 10, 10, 21, 21, 21, 6, 105, 105, 28, 28, 28, 28, 28, 15, 15, 15, 15, 15, 15, 36, 36, 36, 36, 10, 10, 10, 21, 21, 21, 21, 21, 21, 21, 78, 21, 91, 91, 55, 55, 55, 45, 45, 45, 45, 45, 45, 45, 45, 45, 120, 120, 120, 120, 120, 120, 120, 120, 66, 66, 136, 136
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OFFSET

0,2


LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..2000


MATHEMATICA

Select[Table[Length[NestWhileList[If[EvenQ[#], #/2, 3#+1]&, n, #!=1&]]1, {n, 1000}], OddQ[Sqrt[8#+1]]&] (* Harvey P. Dale, Feb 06 2015 *)


CROSSREFS

Cf. A006577.
Sequence in context: A285948 A285835 A285823 * A310124 A059969 A224864
Adjacent sequences: A066901 A066902 A066903 * A066905 A066906 A066907


KEYWORD

nonn


AUTHOR

K.B.Subramaniam (kb_subramaniambalu(AT)yahoo.com), Dec 20 2001


EXTENSIONS

More terms from Sascha Kurz, Mar 23 2002


STATUS

approved



