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 A193559 Augmentation of the triangular array |A123191|. See Comments. 1
 1, 1, 1, 1, 4, 2, 1, 7, 17, 7, 1, 10, 41, 82, 32, 1, 13, 74, 238, 434, 166, 1, 16, 116, 502, 1412, 2446, 926, 1, 19, 167, 901, 3317, 8587, 14405, 5419, 1, 22, 227, 1462, 6581, 21802, 53381, 87610, 32816, 1, 25, 296, 2212, 11717, 46681, 143666, 338038 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS For an introduction to the unary operation "augmentation" as applied to triangular arrays or sequences of polynomials, see A193091. LINKS EXAMPLE First five rows of |A123191|: 1 1...1 1...3...1 1...3...3...1 1...3...3...3...1 First 5 rows of A193559: 1 1...1 1...4...2 1...7...17...7 1...10..41...82...32 MATHEMATICA p[n_, k_] := If[Or[k == 0, k == n], 1, 3] Table[p[n, k], {n, 0, 5}, {k, 0, n}] (* Abs. value of A123191 *) m[n_] := Table[If[i <= j, p[n + 1 - i, j - i], 0], {i, n}, {j, n + 1}] TableForm[m[4]] w[0, 0] = 1; w[1, 0] = p[1, 0]; w[1, 1] = p[1, 1]; v[0] = w[0, 0]; v[1] = {w[1, 0], w[1, 1]}; v[n_] := v[n - 1].m[n] TableForm[Table[v[n], {n, 0, 6}]] (* A193559 *) Flatten[Table[v[n], {n, 0, 10}]] CROSSREFS Cf. A193091. Sequence in context: A142147 A291977 A142073 * A135294 A175938 A117016 Adjacent sequences: A193556 A193557 A193558 * A193560 A193561 A193562 KEYWORD nonn,tabl AUTHOR Clark Kimberling, Jul 30 2011 STATUS approved

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Last modified December 8 03:48 EST 2022. Contains 358672 sequences. (Running on oeis4.)