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Search: id:A082375
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| A082375 |
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Triangular array read by rows: n-th row begins with n and decreases by 2 until 0 or 1 is reached. |
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+0
1
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| 0, 1, 2, 0, 3, 1, 4, 2, 0, 5, 3, 1, 6, 4, 2, 0, 7, 5, 3, 1, 8, 6, 4, 2, 0, 9, 7, 5, 3, 1, 10, 8, 6, 4, 2, 0, 11, 9, 7, 5, 3, 1, 12, 10, 8, 6, 4, 2, 0, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0, 15, 13, 11, 9, 7, 5, 3, 1, 16, 14, 12, 10, 8, 6, 4, 2, 0, 17, 15, 13, 11, 9, 7, 5, 3, 1, 18, 16, 14
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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a(n)=A025644(n+1) for n<=142.
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EXAMPLE
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0; 1; 2,0; 3,1; 4,2,0; 5,3,1; 6,4,2,0; 7,5,3,1; ...
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PROGRAM
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(PARI) a(n)=local(m); if(n<0, 0, m=sqrtint(1+4*n); m-1-(1+4*n-m^2)\2)
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CROSSREFS
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Sequence in context: A135156 A063277 A029178 this_sequence A025644 A022332 A025636
Adjacent sequences: A082372 A082373 A082374 this_sequence A082376 A082377 A082378
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KEYWORD
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nonn,tabf
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AUTHOR
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Michael Somos, Apr 9, 2003
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