A036101 Centered cube numbers: (n+1)^23 + n^23.
1, 8388609, 94151567435, 70462887356491, 11991297699255789, 801651152008680941, 28158477563134519159, 617664557698786568055, 9453233930011206747641, 108862938119652501095929
Offset: 0
Examples
a(2) = 1^23 + (1+1)^23 = 8388609 = 3 * 2796203, which is semiprime.
References
- B. K. Teo and N. J. A. Sloane, Magic numbers in polygonal and polyhedral clusters, Inorgan. Chem. 24 (1985), 4545-4558.
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Programs
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Magma
[(n+1)^23+n^23: n in [0..20]]; // Vincenzo Librandi, Aug 28 2011
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Mathematica
Total/@Partition[Range[0,20]^23,2,1] (* Harvey P. Dale, Nov 02 2023 *)
Comments