cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

Original entry on oeis.org

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

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Author

Omar E. Pol, Mar 01 2008

Keywords

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.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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