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.

Showing 1-2 of 2 results.

A139567 Bisection of ultraperfect numbers A139306.

Original entry on oeis.org

8, 512, 33554432, 137438953472, 2658455991569831745807614120560689152
Offset: 1

Views

Author

Omar E. Pol, May 08 2008

Keywords

Links

Crossrefs

Cf. A099057, A099058, A139306, A139563, A139564, A139568.

Formula

a(n) = A139306(2*n-1). - Jinyuan Wang, Mar 14 2020

A139568 Bisection of ultraperfect numbers A139306.

Original entry on oeis.org

32, 8192, 8589934592, 2305843009213693952, 191561942608236107294793378393788647952342390272950272
Offset: 1

Views

Author

Omar E. Pol, May 08 2008

Keywords

Links

Crossrefs

Cf. A099057, A099058, A139306, A139563, A139564, A139567.

Formula

a(n) = A139306(2*n). - Jinyuan Wang, Mar 14 2020
Showing 1-2 of 2 results.

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

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