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A132610 Triangle T, read by rows, where row n+1 of T = row n of matrix power T^(2n) with appended '1' for n>=0 with T(0,0)=1. +0
8
1, 1, 1, 2, 1, 1, 14, 4, 1, 1, 194, 39, 6, 1, 1, 4114, 648, 76, 8, 1, 1, 118042, 15465, 1510, 125, 10, 1, 1, 4274612, 483240, 41121, 2908, 186, 12, 1, 1, 186932958, 18685905, 1424178, 89670, 4970, 259, 14, 1, 1, 9577713250, 861282832, 59857416, 3437248 (list; table; graph; listen)
OFFSET

0,4

FORMULA

T(n+1,1) is divisible by n for n>=1.

EXAMPLE

Triangle begins:

1;

1, 1;

2, 1, 1;

14, 4, 1, 1;

194, 39, 6, 1, 1;

4114, 648, 76, 8, 1, 1;

118042, 15465, 1510, 125, 10, 1, 1;

4274612, 483240, 41121, 2908, 186, 12, 1, 1;

186932958, 18685905, 1424178, 89670, 4970, 259, 14, 1, 1; ...

GENERATE T FROM EVEN MATRIX POWERS OF T.

Matrix square T^2 begins:

1;

2, 1; <-- row 2 of T

5, 2, 1;

34, 9, 2, 1;

453, 88, 13, 2, 1; ...

where row 2 of T = row 1 of T^2 with appended '1'.

Matrix fourth powers T^4 begins:

1;

4, 1;

14, 4, 1; <-- row 3 of T

96, 22, 4, 1;

1215, 220, 30, 4, 1; ...

where row 3 of T = row 2 of T^4 with appended '1'.

Matrix sixth power T^6 begins:

1;

6, 1;

27, 6, 1;

194, 39, 6, 1; <-- row 4 of T

2394, 404, 51, 6, 1; ...

where row 4 of T = row 3 of T^6 with appended '1'.

ALTERNATE GENERATING METHOD.

Start with [1,0,0,0]; take partial sums and append 1 zero;

take partial sums twice more:

(1), 0, 0, 0;

1, 1, 1, (1), 0;

1, 2, 3, 4, (4);

1, 3, 6, 10, (14);

the final non-zero terms forms row 3: [14,4,1,1].

Start with [1,0,0,0,0,0]; take partial sums and append 3 zeros;

take partial sums and append 1 zero; take partial sums twice more:

(1), 0, 0, 0, 0, 0;

1, 1, 1, 1, 1, (1), 0, 0, 0;

1, 2, 3, 4, 5, 6, 6, 6, (6), 0;

1, 3, 6, 10, 15, 21, 27, 33, 39, (39);

1, 4, 10, 20, 35, 56, 83, 116, 155, (194);

the final non-zero terms forms row 4: [194,39,6,1,1].

Continuing in this way produces all the rows of this triangle.

PROGRAM

(PARI) {T(n, k)=local(A=vector(n+1), p); A[1]=1; for(j=1, n-k-1, p=(n-1)^2-(n-j-1)^2; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A=Vec((Polrev(A)+x*O(x^p))/(1-x)); A[p+1]}

CROSSREFS

Cf. columns: A132611, A132612, A132613; A132614; variants: A132615, A101479.

Sequence in context: A066094 A010246 A054505 this_sequence A132625 A132318 A078089

Adjacent sequences: A132607 A132608 A132609 this_sequence A132611 A132612 A132613

KEYWORD

nonn,tabl

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Aug 23 2007

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Last modified December 4 15:51 EST 2008. Contains 151308 sequences.


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