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A209156 Triangle read by rows: denominators of Stirling-like triangle of rational numbers. 1
1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 3, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 4, 2, 2, 1, 1, 1, 3, 3, 1, 3, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..36.

Joseph M. Santmyer, A Stirling like sequence of rational numbers, Discrete Math. 171 (1997), no. 1-3, 229-235. MR1454453.

EXAMPLE

Triangle begins:

-1,

-1,1,

-1,3/2,-1,

-1,1,-2,1,

-1,5,-5/3,5/2,-1,

-1,1,-5,5/2,-3,1,

-1,7,-7/3,35/4,-7/2,7/2,-1,

-1,4,-28/3,7/3,-14,14/3,-4,1,...

CROSSREFS

Cf. A209155.

Sequence in context: A186027 A322482 A231071 * A329325 A191004 A191358

Adjacent sequences:  A209153 A209154 A209155 * A209157 A209158 A209159

KEYWORD

nonn,frac,tabl,more

AUTHOR

N. J. A. Sloane, Mar 05 2012

STATUS

approved

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Last modified May 18 16:07 EDT 2021. Contains 343995 sequences. (Running on oeis4.)