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 1-10 of 36 results. Next

A162522 First differences of magic numbers A018226.

Original entry on oeis.org

6, 12, 8, 22, 32, 44
Offset: 1

Views

Author

Omar E. Pol, Jul 06 2009

Keywords

Comments

Sequence related to atomic nuclei.

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162521, A162523, A162524, A162525.

A162521 Magic numbers A018226 divided by 2.

Original entry on oeis.org

1, 4, 10, 14, 25, 41, 63
Offset: 1

Views

Author

Omar E. Pol, Jul 06 2009

Keywords

Comments

Sequence related to atomic nuclei.

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162522, A162523, A162524, A162525.

A162523 First differences of magic numbers A018226, divided by 2.

Original entry on oeis.org

3, 6, 4, 11, 16, 22
Offset: 1

Views

Author

Omar E. Pol, Jul 06 2009

Keywords

Comments

Sequence related to atomic nucleus.

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162521, A162522, A162524, A162525.

Formula

a(n) = A162522(n)/2.

A162524 Partial sums of magic numbers A018226.

Original entry on oeis.org

2, 10, 30, 58, 108, 190, 316
Offset: 1

Views

Author

Omar E. Pol, Jul 06 2009

Keywords

Comments

Sequence related to atomic nuclei.

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162521, A162522, A162523, A162525.

Extensions

Edited by Omar E. Pol, Jul 16 2009

A162525 Partial sums of magic numbers A018226, divided by 2.

Original entry on oeis.org

1, 5, 15, 29, 54, 95, 158
Offset: 1

Views

Author

Omar E. Pol, Jul 06 2009

Keywords

Comments

Sequence related to atomic nuclei.

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162521, A162522, A162523, A162524.

Formula

a(n) = A162524(n)/2.

A162518 Characteristic function of magic numbers A018226: 1 if n is a magic number else 0.

Original entry on oeis.org

0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
Offset: 1

Views

Author

Omar E. Pol, Jul 07 2009

Keywords

Comments

Sequence related to atomic nuclei.

Links

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162519, A162521, A162522, A162523, A162524, A162525.

Programs

Extensions

Data section extended up to a(126) by Antti Karttunen, Dec 24 2018

A110856 Magic numbers: another version of A018226, which see for further information.

Original entry on oeis.org

2, 8, 20, 28, 82, 126
Offset: 1

Views

Author

N. J. A. Sloane, Aug 08 2006

Keywords

Links

Crossrefs

Cf. A018226.

A162519 Characteristic function of magic numbers A018226: 0 if n is a magic number else 1.

Original entry on oeis.org

1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
Offset: 1

Views

Author

Omar E. Pol, Jul 07 2009

Keywords

Comments

Also, successive digits of A130598.
This sequence is related to atomic nuclei. See also A162518.

Links

Crossrefs

Cf. A018226, A130517, A130556, A130598, A130602, A162518, A162521, A162522, A162523, A162524, A162525.

A117612 An old nuclear shell closure sequence for 2 nucleon states (related to A007290 and A018226) in a square potential well.

Original entry on oeis.org

2, 8, 18, 20, 34, 40, 58, 68, 92, 132, 138
Offset: 0

Views

Author

Roger L. Bagula, Apr 06 2006

Keywords

Comments

An earlier theory that led to the nuclear magic number shell theory of A018226.

References

  • W. E. Burcham, Nuclear Physics, An Introduction, McGraw-Hill, New York, 1963, page 367-368.

Crossrefs

Cf. A007290 and A018226.

Formula

a(n) = 2*(2*l+1) for quantum number l.

A117635 Royal elements sequence from A018226 plus closed next shell at 168: H,B,Cl,Mn,Ag,Au,X(Unknown).

Original entry on oeis.org

1, 5, 17, 25, 47, 79, 165
Offset: 0

Views

Author

Roger L. Bagula, Apr 08 2006

Keywords

Comments

The 168 (168-3) is arrived at as the inert gas state electrically when the next f electrons and the first g electrons are filled. It also agrees with the Meastro sequence at 13^2. This approach predicts a relatively stable state about 16 neutrons/protons lower than the Pythagoren approach mentioned in A018226. 168 also has the benefit of being the Klein SPL(2,7) and Fano projective Plane group element number in a geodetic geometric model.

Crossrefs

Cf. A018226.

Formula

a(n) = Abs[A018226[n]-3]
Showing 1-10 of 36 results. Next

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

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