A067691 a(n) = (a(n-1) + 1)^(n-1) for n > 0, a(0) = 0.

0, 1, 2, 9, 1000, 1004006004001, 1020191144865623440455270145683555422808365843606721760320032

Offset

0,3

Comments

a(7) has 361 digits.

Links

Table of n, a(n) for n=0..6.

Example

Given a(3) = 9: a(4) = (a(4-1)+1)^(4-1) = (9+1)^3 = 1000.

Prog

(PARI) a(n) = if (n==0, 0, (a(n-1) + 1)^(n-1)); \\ Michel Marcus, Feb 05 2021

Crossrefs

Cf. A004019.

Sequence in context: A114953 A252583 A253604 * A062840 A024226 A252584

Adjacent sequences: A067688 A067689 A067690 * A067692 A067693 A067694

Keyword

nonn

Author

Reinhard Zumkeller, Feb 04 2002

Status

approved