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Search: id:A114283
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| A114283 |
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Sequence array for binomial transform of Jacobsthal numbers A001045(n+1). |
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+0
2
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| 1, 2, 1, 6, 2, 1, 18, 6, 2, 1, 54, 18, 6, 2, 1, 162, 54, 18, 6, 2, 1, 486, 162, 54, 18, 6, 2, 1, 1458, 486, 162, 54, 18, 6, 2, 1, 4374, 1458, 486, 162, 54, 18, 6, 2, 1, 13122, 4374, 1458, 486, 162, 54, 18, 6, 2, 1, 39366, 13122, 4374, 1458, 486, 162, 54, 18, 6, 2, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Sequence array for A025192. Row sums are 3^n, A000244. Diagonal sums are A015518(n+1). Inverse is A114284.
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FORMULA
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Riordan array ((1-x)/(1-3x), x).
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EXAMPLE
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Triangle begins
1;
2,1;
6,2,1;
18,6,2,1;
54,18,6,2,1;
162,54,18,6,2,1;
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CROSSREFS
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Sequence in context: A103881 A101024 A124730 this_sequence A106187 A110135 A114423
Adjacent sequences: A114280 A114281 A114282 this_sequence A114284 A114285 A114286
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Nov 20 2005
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