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 A244580 Square array read by antidiagonals related to the symmetric representation of sigma. 14
 1, 2, 2, 3, 2, 3, 4, 3, 3, 4, 5, 4, 4, 4, 5, 6, 5, 4, 4, 5, 6, 7, 6, 5, 6, 5, 6, 7, 8, 7, 6, 6, 6, 6, 7, 8, 9, 8, 7, 6, 6, 6, 7, 8, 9, 10, 9, 8, 7, 8, 8, 7, 8, 9, 10, 11, 10, 9, 8, 8, 8, 8, 8, 9, 10, 11, 12, 11, 10, 9, 8, 9, 9, 8, 9, 10, 11, 12 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The number of parts k in the square array is equal to A000203(k) hence the sum of parts k is equal to A064987(k). The structure has a three-dimensional representation using polycubes. T(n,k) is the height of a column. The total area in the horizontal level z gives A000203(z). The main diagonal gives A244367. LINKS EXAMPLE .                         _ _ _ _ _ _ _ _ _ 1,2,3,4,5,6,7,8,9...     |_| | | | | | | | | 2,2,3,4,5,6,7,8,9...     |_ _|_| | | | | | | 3,3,4,4,5,6,7,8,9...     |_ _|  _|_| | | | | 4,4,4,6,6,6,7,8,9...     |_ _ _|    _|_| | | 5,5,5,6,6,8,8,8,9...     |_ _ _|  _|  _ _|_| 6,6,6,6,8,8,9...         |_ _ _ _|  _| | 7,7,7,7,8,9,9...         |_ _ _ _| |_ _| 8,8,8,8,8...             |_ _ _ _ _| 9,9,9,9,9...             |_ _ _ _ _| . CROSSREFS Cf. A000203, A064987, A143128, A185283, A196020, A236104, A235791, A237270, A237271, A237591, A237593, A071562, A244367. Sequence in context: A051125 A321126 A342765 * A131830 A147952 A091316 Adjacent sequences:  A244577 A244578 A244579 * A244581 A244582 A244583 KEYWORD nonn,tabl AUTHOR Omar E. Pol, Jul 04 2014 STATUS approved

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Last modified April 16 04:49 EDT 2021. Contains 343030 sequences. (Running on oeis4.)