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 A059434 Triangle formed when cumulative boustrophedon transform is applied to 1, 1, 1, 1, ..., read by rows in natural order. 2
 1, 1, 2, 1, 3, 6, 1, 7, 16, 26, 1, 27, 69, 118, 168, 1, 169, 455, 810, 1192, 1575, 1, 1576, 4343, 7920, 11952, 16153, 20355, 1, 20356, 56864, 105324, 161704, 222427, 284726, 347026, 1, 347027, 978779, 1832958, 2848841, 3970048, 5148119, 6346546 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS EXAMPLE 1; 1,2; 6,3,1; 1,7,16,26; 168,118,69,27,1; ... MATHEMATICA nmax = 9; Clear[CBOUS2, c]; CBOUS2[a_List] := CBOUS2[a] = Module[{i, j, n, r }, n = Min[Length[a], nmax]; For[i = 0, i <= n - 1, i++, c[i, 0] = a[[i + 1]]]; For[i = n - 1, i <= nmax, i++, For[j = 1, j <= i, j++, c[i, j] = c[i, j - 1] + Sum[c[i - 1, i - r], {r, 1, j}]]]; Return[Table[c[i, i], {i, 0, n - 1}]]]; Do[CBOUS2[Table[1, {n}]], {n, 0, nmax}]; Table[c[i, j], {i, 0, nmax - 1}, {j, 0, i}] // Flatten (* Jean-François Alcover, Jul 14 2017, adapted from Maple code for A059430 *) CROSSREFS Cf. A059430, A059433. Sequence in context: A156914 A289656 A248686 * A292222 A182928 A141476 Adjacent sequences:  A059431 A059432 A059433 * A059435 A059436 A059437 KEYWORD nonn,tabl,easy AUTHOR N. J. A. Sloane, Jan 31 2001 EXTENSIONS More terms from Floor van Lamoen, Oct 08 2001 STATUS approved

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Last modified September 25 11:25 EDT 2020. Contains 337337 sequences. (Running on oeis4.)