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A111672 Array T(n,k) = A153277(n-1,k) = A144150(n,k) read downwards antidiagonals. 3
1, 1, 1, 1, 2, 1, 1, 3, 5, 1, 1, 4, 12, 15, 1, 1, 5, 22, 60, 52, 1, 1, 6, 35, 154, 358, 203, 1, 1, 7, 51, 315, 1304, 2471, 877, 1, 1, 8, 70, 561, 3455, 12915, 19302, 21147, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Column k is obtained by taking the k-th matrix power of the triangle A008277 and multiplying from the right with the column vector [1,0,0,0,....].

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

The array starts

1,  1,   1,    1,    1,    1,  ...

1,  2,   3,    4,    5,    6,  ...

1,  5,  12,   22,   35,   51,  ...

1, 15,  60,  154,  315,  561,  ...

1, 52, 358, 1304, 3455, 7556,  ...

CROSSREFS

Cf. A008277, A000326 (row 3), A005945 (row 4), A000110 (column 2), A000258 (column 3), A000307 (column 4), A000357 (column 5), A000405 (column 6), A111669 (column 7), A081624.

Sequence in context: A335975 A241578 A112338 * A323206 A128198 A320031

Adjacent sequences:  A111669 A111670 A111671 * A111673 A111674 A111675

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 14 2005

STATUS

approved

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Last modified July 14 07:08 EDT 2020. Contains 335720 sequences. (Running on oeis4.)