A257577 Continued square root map applied to cubes: 1, 2^3, 3^3, 4^3, ...

2, 1, 7, 6, 7, 8, 8, 5, 9, 7, 1, 3, 3, 4, 4, 1, 9, 8, 5, 8, 3, 9, 8, 5, 7, 0, 6, 1, 7, 2, 1, 8, 3, 8, 3, 6, 5, 3, 4, 8, 3, 2, 4, 8, 6, 5, 3, 0, 0, 0, 2, 6, 2, 2, 4, 9, 3, 1, 8, 6, 8, 4, 3, 2, 6, 9, 9, 5, 6, 0, 4, 7, 8, 6, 9, 5, 7, 6, 9, 1, 4, 4, 3, 2, 0, 0, 2

Offset: 1

Author

N. J. A. Sloane, May 02 2015

Keywords

• nonn
• cons

Comments

The continued square root map applied to a sequence b(1), b(2), b(3), ... produces the decimal number sqrt(b(1)+sqrt(b(2)+sqrt(b(3)+sqrt(b(4)+...)))).

Examples

			2.1767885971334419858398570...
		

Links

• Hiroaki Yamanouchi, Table of n, a(n) for n = 1..1000
• Herman P. Robinson, The CSR Function, Popular Computing (Calabasas, CA), Vol. 4 (No. 35, Feb 1976), pages PC35-3 to PC35-4. Annotated and scanned copy.

Crossrefs

Cf. A000578 (the cubes).

Extensions

a(27)-a(87) from Hiroaki Yamanouchi, May 03 2015