2,4

Table of n, a(n) for n=2..104.

Cf. A047988. Same formula except you cannot subtract 1 (only add).

Sequence in context: A114640 A056890 A169590 * A116375 A054078 A029400

Adjacent sequences: A048822 A048823 A048824 * A048826 A048827 A048828

nonn

Christian G. Bower, May 15 1999.

Edited by Max Alekseyev, Jun 13 2011

approved