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A125752 Moessner triangle using the Fibonacci terms. +0
3
1, 1, 2, 4, 9, 8, 26, 69, 77, 55, 261, 806, 1088, 920, 610, 4062, 14362, 22887, 22856, 17034, 10946, 98912, 395253, 728605, 847832, 721756, 502606, 317811, 3809193, 17008391, 35644614, 47557978, 46166656, 35655012, 23828383, 14930352 (list; table; graph; listen)
OFFSET

1,3

COMMENT

A Moessner triangle is generated with the recurrence described in A125714,

starting from a first row M(1,c) filled with the Fibonacci numbers M(1,c)=A000045(c), c>=1.

Subsequent rows n are generated from the numbers in their previous rows with the rule:

Mark/circle all elements M(n-1,A000217(t)) of the previous row n-1, t>=1.

Define the elements M(n,.) as the partial sums of the M(n-1,.) that have not been marked:

M(n,c) = sum_{j=1..c} M(n-1,A014132(j)), c>=1. The T(n,m) are then defined by reading

the marked/circled terms "along antidiagonals":

T(n,m) = M(n+m-1,A000217(m)), n>=1, 1<=m<=n .

REFERENCES

J. H. Conway and R. K. Guy, "The Book of Numbers", Springer-Verlag, 1996, p. 64.

LINKS

Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Jun 17 2007, Table of n, a(n) for n = 1..55

FORMULA

T(n,n) = A081667(n-1).

EXAMPLE

The upper left corner of the array M(n,c) is

1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584,...

1, 4, 9, 22, 43, 77, 166, 310, 543, 920, 1907, 3504, 6088, 10269, 17034, ...

4, 26, 69, 235, 545, 1088, 2995, 6499, 12587, 22856, 57601, 121003, 230773, ...

26, 261, 806, 3801, 10300, 22887, 80488, 201491, 432264, 847832, 2586423, ...

261, 4062, 14362, 94850, 296341, 728605, 3315028, 9488917, 22445416, ...

4062, 98912, 395253, 3710281, 13199198, 35644614, 213010460, 690899755, ...

and dropping the columns with column numbers in A014132, reading the remaining array

by antidiagonals leads to the final triangle T(n,m):

1;

1, 2;

4, 9, 8;

26, 69, 77, 55;

261, 806, 1088, 920, 610;

CROSSREFS

Cf. A125714, A125750, A125751, A081667.

Sequence in context: A033149 A131094 A129598 this_sequence A103147 A079781 A163299

Adjacent sequences: A125749 A125750 A125751 this_sequence A125753 A125754 A125755

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Dec 06 2006

EXTENSIONS

More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Jun 17 2007

Description of starting row corrected. Comments detailed with formulas - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 17 2009

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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