A059137 A hierarchical sequence (W3{2,2}cc - see A059126).

18, 54, 18, 90, 18, 54, 18, 126, 18, 54, 18, 90, 18, 54, 18, 162, 18, 54, 18, 90, 18, 54, 18, 126, 18, 54, 18, 90, 18, 54, 18, 198, 18, 54, 18, 90, 18, 54, 18, 126, 18, 54, 18, 90, 18, 54, 18, 162, 18, 54, 18, 90, 18, 54, 18, 126, 18, 54, 18, 90, 18, 54, 18, 234, 18, 54

Offset: 0

Author

Jonas Wallgren, Jan 19 2001

Keywords

• easy
• nonn

Links

• Jonas Wallgren, Hierarchical sequences

Crossrefs

Cf. A037227, A059126, A059136.

Formula

a(n) = 18*A037227(n). - Mitch Harris, Jun 29 2005

a(n) = A059136(3*n) + A059136(3*n+1) + A059136(3*n+2). - Sean A. Irvine, Sep 13 2022