A085421 a(0)=2, a(1)=1, a(n+2)=floor[(e-1/e)*a(n+1)+a(n-2)].

2, 1, 4, 10, 27, 73, 198, 538, 1462, 3974, 10802, 29363, 79816, 216962, 589764, 1603144, 4357797, 11845720, 32200005, 87528688, 237927642, 646754385, 1758060692, 4778904432, 12990409077, 35311592938, 95986861417

Offset: 0

Author

Gary W. Adamson, Jun 29 2003

Keywords

• nonn

Comments

a(n+1)/a(n) converges to e.

For n>0, floor[log a(n)] = n-1.

This resembles a Lucas sequence.

Crossrefs

Cf. A000149, A085422, A085839.

Extensions

Edited by Don Reble, Nov 14 2005