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A076037 Square array read by antidiagonals in which row n has g.f. (1-(n-1)*x*C)/(1-n*x*C) where C = (1/2-1/2*(1-4*x)^(1/2))/x = g.f. for Catalan numbers A000108. 1
1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 3, 5, 5, 1, 1, 4, 10, 14, 14, 1, 1, 5, 17, 35, 42, 42, 1, 1, 6, 26, 74, 126, 132, 132, 1, 1, 7, 37, 137, 326, 462, 429, 429, 1, 1, 8, 50, 230, 726, 1446, 1716, 1430, 1430, 1, 1, 9, 65, 359, 1434, 3858, 6441, 6435, 4862, 4862, 1, 1, 10, 82 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,9

LINKS

Table of n, a(n) for n=0..69.

EXAMPLE

Array begins

1 1 1 2 5 14 42 ... (n=0)

1 1 2 5 14 42 132 ... (n=1)

1 1 3 10 35 126 ... (n=2)

1 1 4 17 74 326 ...

PROG

(PARI) C(x)=(1/2-1/2*(1-4*x)^(1/2))/x; D(x)=(1-(m-1)*x*C(x))/(1-m*x*C(x)); for(i=0, 15, forstep(m=i, 0, -1, print1(polcoeff(D(x), i-m), ", ")); print()) (Klasen)

CROSSREFS

Rows give A000108, A000108, A001700, A049027, A076025, A076026. Cf. A076038, A067347.

Sequence in context: A292741 A060351 A290252 * A215563 A076263 A272689

Adjacent sequences:  A076034 A076035 A076036 * A076038 A076039 A076040

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Oct 29 2002

EXTENSIONS

More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 12 2005

STATUS

approved

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Last modified November 18 13:22 EST 2018. Contains 317306 sequences. (Running on oeis4.)