|
Search: id:A124066
|
|
|
| A124066 |
|
a(n) = the sum of the terms in the n-th antidiagonal of A124976. |
|
+0
1
|
|
| 1, 2, 3, 6, 19, 138, 5555, 5661606, 8017014805939, 549978189515061145367082, 75619002235584922846322716556474301506401613843, 615505010930370584284868847397460604890896977173300806488671348925702765535678512305286
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
MATHEMATICA
|
t[m_, n_] := t[m, n] = If[m == 1 || n == 1, 1, Sum[t[k, n], {k, m - 1}] * Sum[t[m, j], {j, n - 1}]]; Plus @@@ Table[t[d + 1 - j, j], {d, 12}, {j, d}] (*Chandler*)
|
|
CROSSREFS
|
Cf. A124976.
Sequence in context: A018290 A121959 A075633 this_sequence A093447 A002078 A000372
Adjacent sequences: A124063 A124064 A124065 this_sequence A124067 A124068 A124069
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Leroy Quet (qq-quet(AT)mindspring.com), Nov 23 2006
|
|
EXTENSIONS
|
Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 11 2006
|
|
|
Search completed in 0.002 seconds
|
