A054874 - OEIS

A054874

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

0, 1, 2, 8, 2048

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OFFSET

0,3

COMMENTS

The next term is too large to include.

LINKS

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.

KEYWORD

easy,nonn

AUTHOR

STATUS

approved