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A236628 Triangle read by rows in which T(n,k) is the number of parts in the k-th region of the set of overcompositions of n, with overcompositions in colexicographic order. 2

%I #14 Apr 28 2016 11:32:23

%S 2,2,4,2,6,4,12,2,6,4,14,4,6,4,26

%N Triangle read by rows in which T(n,k) is the number of parts in the k-th region of the set of overcompositions of n, with overcompositions in colexicographic order.

%C Right border gives A236002, n >= 1.

%C Row sums give A236625, n >= 1.

%e Written as an irregular triangle in which row n has length 2^n the sequence begins:

%e 2;

%e 2, 4;

%e 2, 6, 4, 12;

%e 2, 6, 4, 14, 4, 6, 4, 26;

%e ...

%e For n = 3 the diagram shows the four regions of the overcompositions of 3, with overcompositions in colexicographic order.

%e ------------------------------------------------

%e . Diagram of Regions of the diagram

%e overcompositions ------------------------

%e . of 3 k: 1 2 3 4

%e ------------------------------------------------

%e . _ _ _ _ _ _

%e 1 |.| | | |.| | | | |

%e 2 |_| | | |_| _| | | |

%e 3 | .|.| | .| |.|

%e 4 | |.| | | |.|

%e 5 | .| | | .| | |

%e 6 |_ _| | |_ _| _ _| |

%e 7 |.| .| |.| | .|

%e 8 | | .| | | | .|

%e 9 |.| | |.| | |

%e 10 |_| | |_| _| |

%e 11 | .| | .|

%e 12 |_ _ _| |_ _ _|

%e ...

%e Number of parts.........: 2 6 4 12

%e .

%e Every row of every region contains only one part.

%Y Cf. A236002, A236625, A236626.

%K nonn,tabf,more

%O 1,1

%A _Omar E. Pol_, Feb 01 2014

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)