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A123566
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Table (read by antidiagonals) where t(1,n) = t(m,1) = 1 and where t(m,n) = LCM(sum{k=1 to m-1} t(k,n), sum{j=1 to n-1} t(m,j)).
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0
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1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 4, 3, 4, 1, 1, 8, 30, 30, 8, 1, 1, 16, 36, 35, 36, 16, 1, 1, 32, 1224, 630, 630, 1224, 32, 1, 1, 64, 14256, 868700, 675, 868700, 14256, 64, 1, 1, 128, 1010880, 4140952200, 1174420350, 1174420350, 4140952200, 1010880, 128, 1, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,8
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EXAMPLE
| t(5,3) = LCM(sum{k=1 to 4} t(k,3), sum{j=1 to 2} t(5,j)) = LCM(1+2+3+30, 1+8) = LCM(36,9) = 36.
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MATHEMATICA
| t[m_, n_] := t[m, n] = If[m == 1 || n == 1, 1, LCM[Sum[t[k, n], {k, m - 1}], Sum[t[m, j], {j, n - 1}]]]; Flatten@Table[t[d + 1 - j, j], {d, 11}, {j, d}] (*Chandler*)
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CROSSREFS
| Sequence in context: A116595 A128315 A198329 * A201757 A053390 A140643
Adjacent sequences: A123563 A123564 A123565 * A123567 A123568 A123569
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KEYWORD
| nonn,tabl
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AUTHOR
| Leroy Quet Nov 12 2006
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 19 2006
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