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Search: id:A082189
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| 1, 5, 12, 41, 26, 103, 58, 181, 92, 293, 128, 439, 174, 617, 230, 817, 290, 1037, 376, 1225, 446, 1565, 542, 1883, 628, 2227, 746, 2555, 848, 2983, 962, 3409, 1102, 3859, 1238, 4331, 1384, 4823, 1532, 5345, 1684, 5945, 1858, 6539, 2038, 7135, 2218, 7801
(list; graph; listen)
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OFFSET
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1,2
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MAPLE
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b:= proc(t) option remember; false end: b(1):= true: ncpr:= proc() local i, m; m:= args[1]; for i from 2 to nargs do if igcd (m, args[i])<>1 then RETURN (true) fi od; false end: T:= proc(n, k) option remember; local h, t, l; if n<1 or k<1 or n=1 and k=1 then t:=1 else h:= 1- 2* irem(n+k, 2); l:= T(n-1, k), T(n, k-1), T(n-1, k-1), T(n+h, k-h); for t while b(t) or ncpr(t, l) do od fi; b(t):= true; t end: seq (T(n, n), n=1..60); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 07 2009]
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CROSSREFS
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Cf. A082025, A082187, A082188, A082190.
Sequence in context: A092772 A164737 A120779 this_sequence A129795 A052644 A052280
Adjacent sequences: A082186 A082187 A082188 this_sequence A082190 A082191 A082192
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 07 2003
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EXTENSIONS
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Edited with more terms and Maple program by Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 07 2009
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