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A082039
Symmetric square array defined by T(n,k) = k^2*n^2 + k*n + 1, read by antidiagonals.
8
1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 13, 21, 13, 1, 1, 21, 43, 43, 21, 1, 1, 31, 73, 91, 73, 31, 1, 1, 43, 111, 157, 157, 111, 43, 1, 1, 57, 157, 241, 273, 241, 157, 57, 1, 1, 73, 211, 343, 421, 421, 343, 211, 73, 1, 1, 91, 273, 463, 601, 651, 601, 463, 273, 91, 1, 1, 111, 343, 601, 813, 931, 931, 813, 601, 343, 111, 1
OFFSET
0,5
EXAMPLE
Square array T(n,k) begins:
1 1 1 1 1 1 ...
1 3 7 13 21 31 ...
1 7 21 43 73 111 ...
1 13 43 91 157 241 ...
1 21 73 157 273 421 ...
...
CROSSREFS
Rows include A054569, A002061, A082040, A082041.
Main diagonal is A059826.
Cf. A082038.
Sequence in context: A146900 A132733 A347971 * A367505 A176331 A157836
KEYWORD
easy,nonn,tabl
AUTHOR
Paul Barry, Apr 02 2003
STATUS
approved