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 1-4 of 4 results.

A048559 a(n+1) is next smallest nontrivial square beginning with a(n), initial square is 4.

Original entry on oeis.org

4, 49, 49284, 4928461209, 492846120914204828164, 4928461209142048281644440027571600000000001, 49284612091420482816444400275716000000000017667716927194638935286982918857620344809476
Offset: 0

Views

Author

Patrick De Geest, May 15 1999

Keywords

Comments

Next terms are 171, 342 and 685 digits long.

Crossrefs

Cf. A048560.
Cf. A048557, A249893, A249894, A249895, A249896, A249897, A249898, A048561.

A051671 Smallest positive number whose digits concatenated with all previous terms forms a perfect square.

Original entry on oeis.org

4, 9, 284, 61209, 14204828164, 4440027571600000000001, 7667716927194638935286982918857620344809476
Offset: 0

Views

Author

Felice Russo

Keywords

Examples

			284 belongs to the sequence because 49284=222^2.

References

  • A. Murthy, Smar. Notions J. Vol. 11 N. 1-2-3 Spring 2000.

Crossrefs

Cf. A048559, A048560, A051670.

Extensions

More terms from Patrick De Geest, Dec 15 1999

A050631 a(1)=2; for n>1, a(n)^2 is next smallest nontrivial square containing a(n-1)^2 as a substring.

Original entry on oeis.org

2, 7, 43, 136, 10158, 85927342, 738024797793593
Offset: 1

Views

Author

Patrick De Geest, Jul 15 1999

Keywords

Comments

Starting with a(2)=7, the sequence is identical to A050633.

Crossrefs

Cf. A050630, A048560, A050637.

Extensions

a(7) from Max Alekseyev, Feb 15 2012

A050637 a(1) = 2; a(n+1)^2 is next smallest square ending with a(n)^2.

Original entry on oeis.org

2, 8, 42, 2458, 310042, 2929997542, 1046218875000310042, 406005268741864709999999997070002458, 50376698115810287966925579573179705000000000000000001046218875000310042
Offset: 1

Views

Author

Patrick De Geest, Jul 15 1999

Keywords

Crossrefs

Cf. A050636, A048560, A050631, A061361.
See A065789 for an essentially identical sequence.

Extensions

More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Nov 06 2001
Showing 1-4 of 4 results.

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

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