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Search: id:A144155
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| 1, 1, 1, 2, 1, 2, 5, 2, 2, 5, 15, 5, 4, 5, 15, 52, 15, 10, 10, 15, 52, 203, 52, 30, 25, 30, 52, 203, 877, 203, 104, 75, 75, 104, 203, 877
(list; table; graph; listen)
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OFFSET
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0,4
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COMMENT
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Row sums = A014322: (1, 2, 5, 14, 44, 154,...) the Bell numbers convolved with themselves.
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FORMULA
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Triangle read by rows, T(n,k) = A000110(n-k)*A000110(k)
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EXAMPLE
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First few rows of the triangle =
1;
1, 1;
2, 1, 2;
5, 2, 2, 5;
15, 5, 4, 5, 15;
52, 15, 10, 10, 15, 52;
203, 52, 30, 25, 30, 52, 203;
...
Row 3 = (5, 2, 2, 5) = termwise products of (1, 1, 2, 5) and (5, 2, 1, 1) = (5*1, 2*2, 2*1, 5*1).
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CROSSREFS
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A000110, Cf. A014322
Sequence in context: A147292 A078391 A153206 this_sequence A109631 A095149 A064192
Adjacent sequences: A144152 A144153 A144154 this_sequence A144156 A144157 A144158
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 12 2008
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