OFFSET
0,5
COMMENTS
In binary representation T(n,k) is the concatenation of T(n-1,k-1) and T(n-1,k), 0<k<n. - Reinhard Zumkeller, Jan 23 2003
LINKS
G. C. Greubel, Table of n, a(n) for the first 14 rows, flattened
FORMULA
T(n, k) = 2^C(n+k, n)-1; a(n) = 2^A007318(n)-1.
If U(n, k) := 1 + T(n, k), then U(n, k) = U(n-1, k) * U(n, k-1). - Michael Somos, Jan 07 2017
MATHEMATICA
Table[2^(Binomial[n, k]) - 1, {n, 0, 5}, {k, 0, n}] (* G. C. Greubel, Jan 07 2017 *)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Henry Bottomley, Jan 26 2001
STATUS
approved