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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A128442 Array T by antidiagonals: T(n,k)=Floor(k*2^(n/2)).

Original entry on oeis.org

1, 2, 2, 4, 4, 2, 5, 6, 5, 4, 7, 8, 8, 8, 5, 8, 10, 11, 12, 11, 8, 9, 12, 14, 16, 16, 16, 11, 11, 14, 16, 20, 22, 24, 22, 16, 12, 16, 19, 24, 28, 32, 33, 32, 22, 14, 18, 22, 28, 33, 40, 45, 48, 45, 32, 15, 20, 25, 32, 39, 48, 56, 64, 67, 64, 45, 16, 22, 28, 36, 45, 56, 67, 80, 90
Offset: 1

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Author

Clark Kimberling, Mar 03 2007

Keywords

Comments

Row 1 = A001951; Row 2 = A005843; Row 3 = A022842; Row 4 = A008586; Column 1 = A017910; T(n,n) = A128441(n).

Examples

			Northwest corner:
1 2 4 5 7
2 4 6 8 10
2 5 8 11 14
4 8 12 16 20
5 11 16 22 28

Crossrefs

Cf. A005843, A008586, A128441.
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