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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A036096 Centered cube numbers: (n+1)^18 + n^18.

Original entry on oeis.org

1, 262145, 387682633, 69106897225, 3883416742361, 105374653934041, 1729973554578865, 19642812107392433, 168109033806481105, 1150094635296999121, 6559917313492231481, 32183250594377475385
Offset: 0

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Author

N. J. A. Sloane

Keywords

Comments

Never prime nor semiprime, as a(n) = (2n^2 + 2n +1) * (n^4 + 2n^3 + 5n^2 + 4n +1) * (n^12 + 6n^11 + 51n^10 + 200n^9 + 480n^8 + 786n^7 + 923n^6 + 792n^5 + 495n^4 + 220n^3 + 66n^2 + 12n + 1). Triprime for n in {9, 347, 1069, 1072, ...}. - Jonathan Vos Post, Aug 27 2011

Examples

			9^18 + (9+1)^18 = 1150094635296999121 = 181 * 8461 * 750988536481, the minimum nontrivial number of prime factors.

References

  • B. K. Teo and N. J. A. Sloane, Magic numbers in polygonal and polyhedral clusters, Inorgan. Chem. 24 (1985), 4545-4558.

Links

Crossrefs

Cf. A010806, A036094, A036095.

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

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