A094177 Sequence from an aptitude test that I cannot work out!

4, 3, 4, 9, 21, 51

Offset: 1

Author

Dominique Butterworth (dominique_butterworth(AT)hotmail.com), May 06 2004

Keywords

• nonn
• unkn
• bref

Comments

Is this an erroneous version of A249453? - Arkadiusz Wesolowski, Oct 29 2014

Formula

For n>0, a(n) = 2^(n+1)-A091855(n) = 3+A128543(n). - M. F. Hasler, Nov 01 2014