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 A211339 Number of integer pairs (x,y) such that 1
 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 8, 8, 9, 10, 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 14, 15, 16, 16, 16, 16, 17, 17, 17, 17, 17, 19, 19, 20, 21, 21, 21, 21, 21, 22, 22, 22, 23, 23, 23, 23, 25, 25, 25, 26, 26, 26, 26, 27, 28, 29 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Partial sums of A025426. For a guide to related sequences, see A211266. LINKS MATHEMATICA a = 1; b = n; z1 = 120; t[n_] := t[n] = Flatten[Table[x^2 + y^2, {x, a, b - 1}, {y, x, b}]] c[n_, k_] := c[n, k] = Count[t[n], k] TableForm[Table[c[n, k], {n, 1, 10}, {k, 1, 2 n}]] Table[c[n, n], {n, 1, z1}]   (* A025426 *) c1[n_, m_] := c1[n, m] = Sum[c[n, k], {k, a, m}] Table[c1[n, n], {n, 1, z1}]  (* A211339 *) CROSSREFS Cf. A211266. Sequence in context: A152595 A176844 A085182 * A087739 A127763 A057367 Adjacent sequences:  A211336 A211337 A211338 * A211340 A211341 A211342 KEYWORD nonn AUTHOR Clark Kimberling, Apr 08 2012 STATUS approved

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