A056235 n*2^(n*2^n+n)-1.

7, 2047, 402653183, 1180591620717411303423, 233840261972944466912589573234605283144949206876159

Offset: 1

Author

Henry Bottomley, Aug 06 2000

Keywords

• nonn

Comments

For n>2, a(n) is base at which zero is reached for the function "write f(j) in base j, read as base j+1 and then subtract 1 to give f(j+1)" starting from f(n)=2n^2-1.

Examples

			a(3)=3*2^(3*2^3+3)-1=3*2^27-1=402653184-1=402653183
		

Formula

a(n) =A003261(A036289(n)) =A036289(n)*A001146(n)^n-1