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A078123
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Square of infinite lower triangular matrix A078122.
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4
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1, 2, 1, 5, 6, 1, 23, 51, 18, 1, 239, 861, 477, 54, 1, 5828, 32856, 25263, 4347, 162, 1, 342383, 3013980, 3016107, 699813, 39285, 486, 1, 50110484, 690729981, 865184724, 253656252, 19053063, 354051, 1458, 1, 18757984046, 406279238154
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| M(1, j)=A078125(j), M(j+1, j)=2*3^j.
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EXAMPLE
| Square of A078122 = A078123 as can be seen by 4 X 4 submatrix:
[1,_0,_0,0]^2=[_1,_0,_0,_0]
[1,_1,_0,0]___[_2,_1,_0,_0]
[1,_3,_1,0]___[_5,_6,_1,_0]
[1,12,_9,1]___[23,51,18,_1]
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CROSSREFS
| Cf. A078121, A078122, A078124, A078125.
Sequence in context: A124575 A178121 A113345 * A062991 A118984 A073474
Adjacent sequences: A078120 A078121 A078122 * A078124 A078125 A078126
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KEYWORD
| nonn,tabl
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AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Nov 18 2002
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