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 A082039 Symmetric square array defined by T(n,k)=(k^2*n^2 + kn + 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 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS Table of n, a(n) for n=0..69. EXAMPLE Rows begin 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 Adjacent sequences: A082036 A082037 A082038 * A082040 A082041 A082042 KEYWORD easy,nonn,tabl AUTHOR Paul Barry, Apr 02 2003 STATUS approved

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Last modified September 11 17:54 EDT 2024. Contains 375839 sequences. (Running on oeis4.)