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Search: id:A111622
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| 1, 3, 5, 7, 11, 15, 17, 19, 21, 23, 27, 31, 33, 35, 39, 43, 53, 57, 59, 61, 63, 67, 79, 95, 97, 101, 115, 127, 129, 131, 135, 137, 139, 143
(list; graph; listen)
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OFFSET
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1,2
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MATHEMATICA
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f[n_] := f[n] = Block[{a}, a[0] = 1; a[l_] := a[l] = Block[{k = 1, s = Sum[ a[i]*x^i, {i, 0, l - 1}]}, While[ IntegerQ[ Last[ CoefficientList[ Series[(s + k*x^l)^(1/n), {x, 0, l}], x]]] != True, k++ ]; k]; Table[a[j], {j, 0, 144}]]; g[n_, m_] := f[n][[m]]; t = Table[ n/g[n, n - 1], {n, 2, 144}]; Select[ Range[143], t[[ # ]] == 2 &]
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CROSSREFS
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Cf. A109626, A111618.
Sequence in context: A087325 A072151 A029626 this_sequence A082418 A085493 A139252
Adjacent sequences: A111619 A111620 A111621 this_sequence A111623 A111624 A111625
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 01 2005
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