A209155 Triangle read by rows: numerators of Stirling-like triangle of rational numbers.

-1, -1, 1, -1, 3, -1, -1, 1, -2, 1, -1, 5, -5, 5, -1, -1, 1, -5, 5, -3, 1, -1, 7, -7, 35, -7, 7, -1, -1, 4, -28, 7, -14, 14, -4, 1

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. A209156.

Sequence in context: A030369 A298667 A226166 * A082062 A030370 A100808

Adjacent sequences: A209152 A209153 A209154 * A209156 A209157 A209158

Keyword

sign,frac,tabl,more

Author

N. J. A. Sloane, Mar 05 2012

Status

approved