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A121175 Sequence S with the following properties: (i) a(1)=2; (ii) for n is S, a(n)=a(1)+a(2)+...+a(n-1); (iii) for n not in S, a(n)=the smallest number different from a(1), ..., a(n-1) not breaking property (ii). 3
2, 2, 4, 8, 3, 7, 26, 52, 10, 114, 12, 240, 14, 494, 16, 1004, 18, 2026, 20, 4072, 22, 8166, 24, 16356, 27, 32739, 65478, 29, 130985, 31, 262001, 33, 524035, 35, 1048105, 37, 2096247, 39, 4192533, 41, 8385107, 43, 16770257, 45, 33540559 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Taking a(1)=2 makes all terms distinct except for a(1)=a(2)=2

LINKS

Table of n, a(n) for n=1..45.

CROSSREFS

Cf. A105753, A121053, A121174, A121173.

Sequence in context: A093094 A045777 A136534 * A183397 A339490 A281469

Adjacent sequences:  A121172 A121173 A121174 * A121176 A121177 A121178

KEYWORD

nonn

AUTHOR

Max Alekseyev, Aug 15 2006

STATUS

approved

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Last modified September 21 07:28 EDT 2021. Contains 347596 sequences. (Running on oeis4.)