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 A293452 Triangle T(n,K) read by rows: T(n,k) is the umber of iterations to reach a final state for an n X k lattice of sand piles on a torus according to rules specified in A249872. 1
 0, 1, 7, 2, 14, 28, 7, 35, 65, 133, 10, 47, 86, 198, 316, 22, 86, 134, 331, 487, 913, 28, 106, 164, 399, 696, 1099, 1360, 50, 159, 288, 589, 930, 1518, 1798, 2987, 60, 187, 336, 681, 1070, 1966, 2320, 3432, 4340, 95, 265, 515, 1052, 1386, 2430, 3475, 4484, 5977, 7495, 110, 303, 584, 1184, 1556, 2718 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Joerg Arndt, Table of n, a(n) for n = 1..5050 (rows 1..50) FORMULA T(n,n) = A249872(n). Conjecture: T(n,1) = A023855(n). EXAMPLE Triangle begins: 0 1, 7 2, 14, 28 7, 35, 65, 133 10, 47, 86, 198, 316 22, 86, 134, 331, 487, 913 28, 106, 164, 399, 696, 1099, 1360 50, 159, 288, 589, 930, 1518, 1798, 2987 60, 187, 336, 681, 1070, 1966, 2320, 3432, 4340 95, 265, 515, 1052, 1386, 2430, 3475, 4484, 5977, 7495 ... CROSSREFS Cf. A249872. Sequence in context: A040048 A070429 A050092 * A030406 A239975 A279807 Adjacent sequences:  A293449 A293450 A293451 * A293453 A293454 A293455 KEYWORD nonn AUTHOR Joerg Arndt, Oct 09 2017 STATUS approved

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