A054874 a(n) = 2^(sum of a(i) where i<n).

0, 1, 2, 8, 2048

Offset

0,3

Comments

The next term is too large to include.

Links

Table of n, a(n) for n=0..4.

Formula

a(n) = 2^A034797(n-1) = A034797(n) - A034797(n-1)

Example

a(4) = 2^(0+1+2+8) = 2^11 = 2048; a(5) = 2^2059>10^619

Crossrefs

Cf. A014221, A034797 for partial sum, so a(n) is number of impartial games with value n-1, using natural enumeration of impartial games.

Sequence in context: A306241 A073630 A027733 * A174736 A324567 A135238

Adjacent sequences: A054871 A054872 A054873 * A054875 A054876 A054877

Keyword

easy,nonn

Author

Henry Bottomley, May 26 2000

Status

approved