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.

A138867 First two digits of n-th even superperfect number A061652(n).

Original entry on oeis.org

2, 4, 16, 64, 40, 65, 26, 10, 11, 30, 81, 85, 34, 26, 52, 73, 22, 12, 95, 14, 23, 17, 14, 21, 22, 20, 42, 26, 26, 25, 37, 87, 64, 20, 40, 31, 63, 21, 46, 62, 14, 61, 15, 62, 10, 84, 15
Offset: 1

Views

Author

Omar E. Pol, Apr 02 2008

Keywords

Comments

Also, first two digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.

Crossrefs

Cf. A019279, A061652, A138862, A138868, A138869, A138873.

Extensions

a(12)-a(31) from R. J. Mathar, Feb 05 2010
a(32)-a(47) from Jinyuan Wang, Mar 14 2020

A138869 Concatenation of first two digits and last two digits of n-th even superperfect number A061652(n).

Original entry on oeis.org

22, 44, 1616, 6464, 4096, 6536, 2644, 1024, 1176, 3056, 8164, 8564, 3476, 2664, 5244, 7304, 2276, 1236, 9596, 1404, 2356, 1776, 1496, 2136, 2276, 2056, 4236, 2604, 2604, 2556, 3724, 8744, 6496, 2064, 4056, 3176, 6336, 2196, 4636, 6224, 1404, 6124, 1536, 6236, 1064, 8476, 1556
Offset: 1

Views

Author

Omar E. Pol, Apr 02 2008

Keywords

Comments

Also, concatenation of first two digits and last two digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.

Crossrefs

Cf. A019279, A061652, A138863, A138867, A138868, A138875.

Extensions

More terms from 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.

Content is available under The OEIS End-User License Agreement.