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A218876 Triangle read by rows: T(n,k) (1 <= k <= n) = number of non-robust primitive binary sequences of length n and curling number k. 2
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 6, 2, 0, 0, 0, 0, 0, 0, 0, 0, 10, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 26, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..91.

B. Chaffin, J. P. Linderman, N. J. A. Sloane and Allan Wilks, On Curling Numbers of Integer Sequences, arXiv:1212.6102, Dec 25 2012.

B. Chaffin, J. P. Linderman, N. J. A. Sloane and Allan Wilks, On Curling Numbers of Integer Sequences, Journal of Integer Sequences, Vol. 16 (2013), Article 13.4.3.

N. J. A. Sloane, First 36 rows of table

Index entries for sequences related to curling numbers

FORMULA

The triangle in A218869 is the sum of triangles A218875 and A218876.

EXAMPLE

Triangle begins:

[0],

[0, 0],

[0, 0, 0],

[0, 0, 0, 0],

[2, 0, 0, 0, 0],

[0, 0, 0, 0, 0, 0],

[4, 0, 0, 0, 0, 0, 0],

[2, 2, 0, 0, 0, 0, 0, 0],

[6, 0, 0, 0, 0, 0, 0, 0, 0],

[6, 0, 0, 0, 0, 0, 0, 0, 0, 0],

[12, 6, 2, 0, 0, 0, 0, 0, 0, 0, 0],

[10, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],

...

CROSSREFS

Cf. A216955, A218869, A218875.

Sequence in context: A047751 A028706 A060175 * A028621 A226557 A067898

Adjacent sequences:  A218873 A218874 A218875 * A218877 A218878 A218879

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Nov 15 2012

STATUS

approved

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Last modified August 18 04:42 EDT 2017. Contains 290684 sequences.