A010860 Constant sequence: a(n) = 21.

21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• Tanya Khovanova, Recursive Sequences
• Index to divisibility sequences
• Index entries for linear recurrences with constant coefficients, signature (1).

Formula

G.f.: 21/(1-x); e.g.f.: 21*e^x. - Vincenzo Librandi, Jan 24 2012