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Search: id:A111619
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| A111619 |
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Even-indexed bisection of the first lower diagonal (A111618). |
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+0
3
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| 1, 2, 3, 4, 10, 6, 14, 8, 9, 10, 11, 12, 26, 14, 30, 16, 17, 18, 38, 20, 42, 22, 46, 48, 50, 52, 27, 56, 29, 30, 31, 32, 66, 34, 70, 72, 74, 76, 78, 40, 82, 84, 86, 88, 90, 92, 94, 48, 49, 100, 51, 104, 106, 108, 110, 112, 114, 58, 118, 120, 122, 124, 126, 64, 65, 66, 134, 68
(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]]; Table[ g[n, n - 1], {n, 2, 144, 2}]
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CROSSREFS
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Cf. A111618.
Sequence in context: A129920 A065634 A087548 this_sequence A084190 A088303 A054930
Adjacent sequences: A111616 A111617 A111618 this_sequence A111620 A111621 A111622
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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 03 2005
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