A135612 Even superperfect numbers divided by 2, written in base 2.

1, 10, 1000, 100000, 100000000000, 1000000000000000, 100000000000000000, 100000000000000000000000000000, 100000000000000000000000000000000000000000000000000000000000

Offset: 1

Author

Omar E. Pol, Mar 01 2008

Keywords

• base
• nonn

Comments

Also, concatenation of "1" and A000043(n)-2 digits "0".

The number of divisors of a(n) is equal to the number of its digits. This number is equal to A090748(n)=A000043(n)-1.

Examples

			a(3)=1000 because A134708(n)=8 and 8 written in base 2 is 1000.
		

Crossrefs

Even superperfect numbers divided by 2: A134708. Cf. A000043, A019279, A090748, A135651, A135656.

Formula

a(n)=A134708(n) written in base 2.