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Search: id:A155118
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| A155118 |
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Triangle. Square array of A140429 and successive differences by S-E diagonals. A001045,Jacobsthal numbers,terms 0,1,3,6,10,15=A000217 of a(n) and A000244=3^n via triangle A036561=1,2,3,4,6,9,. |
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+0
1
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| 0, 1, 1, 1, 2, 3, 3, 4, 6, 9, 5, 8, 12, 18, 27, 11, 16, 24, 36, 54, 81, 21
(list; graph; listen)
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OFFSET
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0,5
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COMMENT
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A000244(n+1)-A001045(n+3): 3-3=0, 9-5=4, 27-11=16, 81-21=60, 243-43=200, 729-85=644, 2187-171=2016, 6561-341=6220, then 4*A094705.
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CROSSREFS
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A046936.
Sequence in context: A116494 A036031 A017818 this_sequence A091275 A046936 A017831
Adjacent sequences: A155115 A155116 A155117 this_sequence A155119 A155120 A155121
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jan 20 2009
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