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A080044 Numerators of triangular array: T(n,1)=T(n,n)=1/n and T(n,k)=T(n-1,k-1)+T(n-1,k), 1<k<n. 1
1, 1, 1, 1, 1, 1, 1, 4, 4, 1, 1, 19, 8, 19, 1, 1, 107, 17, 17, 107, 1, 1, 39, 181, 17, 181, 39, 1, 1, 293, 479, 218, 218, 479, 293, 1, 1, 621, 1058, 1351, 436, 1351, 1058, 621, 1, 1, 5869, 10327, 4563, 619, 619, 4563, 10327, 5869, 1, 1, 6121, 3685, 7541, 17677, 619, 17677 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..62.

EXAMPLE

Triangle begins:.................. Numerators:

.............1/1.........................1

..........1/2...1/2....................1...1

.......1/3...1/1...1/3...............1...1...1

....1/4...4/3...4/3...1/4..........1...4...4...1

.1/5..19/12..8/3..19/12..1/5.....1..19...8..19...1.

CROSSREFS

Cf. A007318, A080045.

Sequence in context: A221837 A189150 A155194 * A128433 A089746 A225330

Adjacent sequences:  A080041 A080042 A080043 * A080045 A080046 A080047

KEYWORD

nonn,tabl,frac

AUTHOR

Reinhard Zumkeller, Jan 21 2003

STATUS

approved

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Last modified June 26 00:10 EDT 2019. Contains 324367 sequences. (Running on oeis4.)