A013900 a(n) = 21^(5*n + 3).

9261, 37822859361, 154472377739119461, 630880792396715529789561, 2576580875108218291929075869661, 10523016528610349434285830688358359761, 42977062327514056734916195400155065458259861, 175522663228862486625127968549968702993144556569961

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..50
• Tanya Khovanova, Recursive Sequences
• Index entries for linear recurrences with constant coefficients, signature (4084101).

Crossrefs

Cf. A009965.

Programs

Magma

[21^(5*n+3): n in [0..10]]; // Vincenzo Librandi, May 27 2011

Formula

a(n) = 4084101*a(n-1), a(0)=9261. - Vincenzo Librandi, May 27 2011