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A136534 A001263 * A128064 (unsigned). 1
1, 2, 2, 4, 8, 3, 7, 24, 21, 4, 11, 60, 90, 44, 5, 16, 130, 300, 260, 80, 6, 22, 2252, 840, 1120, 630, 132, 7, 29, 448, 2058, 3920, 3430, 1344, 203, 8, 37, 744, 4536, 11760, 14700, 9072, 2604, 296, 9, 46, 1170, 9180, 31248, 52920, 46872, 21420, 4680, 414, 10 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A001791: (1, 4, 15, 56, 210,...). Left Column = A000124: (1, 2, 4, 7, 11, 16, 22,...).

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A001263 * A128064 (unsigned), A001263 = the Narayana triangle, A128064 = an infinite lower triangular matrix with (1, 2, 3,...) in the main and subdiagonals.

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

4, 8, 3;

7, 24, 21, 4;

11, 60, 90, 44, 5;

16, 130, 300, 260, 80, 6;

22, 252, 840, 1120, 630, 132, 7;

...

CROSSREFS

Cf. A001263, A128064, A001791, A000124.

Sequence in context: A112059 A093094 A045777 * A121175 A183397 A281469

Adjacent sequences:  A136531 A136532 A136533 * A136535 A136536 A136537

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 04 2008

STATUS

approved

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Last modified February 21 19:26 EST 2018. Contains 299422 sequences. (Running on oeis4.)