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 A057054 Let R(i,j) be the rectangle with antidiagonals 1; 2,3; 4,5,6; ...; n^3 is in antidiagonal a(n). 3
 1, 4, 7, 11, 16, 21, 26, 32, 38, 45, 52, 59, 66, 74, 82, 91, 99, 108, 117, 126, 136, 146, 156, 166, 177, 187, 198, 210, 221, 232, 244, 256, 268, 280, 293, 305, 318, 331, 344, 358, 371, 385, 399, 413, 427, 441, 456, 470, 485, 500 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA Round(n*(sqrt(2*n))). - Vladeta Jovovic, Jun 14 2003 MATHEMATICA Table[Round[n Sqrt[2n]], {n, 50}] (* Harvey P. Dale, Feb 10 2020 *) CROSSREFS Cf. A057045, A057062, A057048, A022846, A057057. Sequence in context: A310754 A310755 A310756 * A269132 A310757 A231603 Adjacent sequences:  A057051 A057052 A057053 * A057055 A057056 A057057 KEYWORD nonn,changed AUTHOR Clark Kimberling, Jul 30 2000 STATUS approved

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Last modified February 21 17:15 EST 2020. Contains 332100 sequences. (Running on oeis4.)