|
| |
|
|
A082189
|
|
Main diagonal of square array A082025.
|
|
5
|
|
|
|
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;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
Alois P. Heinz, Table of n, a(n) for n = 1..100
|
|
|
MAPLE
|
b:= proc(t) 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..40); # Alois P. Heinz, Oct 07 2009
|
|
|
CROSSREFS
|
Cf. A082025, A082187, A082188, A082190.
Sequence in context: A092772 A164737 A120779 * A129795 A187916 A052644
Adjacent sequences: A082186 A082187 A082188 * A082190 A082191 A082192
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 07 2003
|
|
|
EXTENSIONS
|
Edited and more terms from Alois P. Heinz, Oct 07 2009
|
|
|
STATUS
|
approved
|
| |
|
|
