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A111626 T(2n, n)/n of A109626. +0
2
1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2 (list; graph; listen)
OFFSET

1,2

COMMENT

A sequence of just 1's and 2's.

MATHEMATICA

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, 128}]]; g[n_, m_] := f[n][[m]]; Table[ g[2n, n]/n, {n, 80}]

CROSSREFS

Cf. A109626.

Sequence in context: A083165 A043535 A043560 this_sequence A043536 A043561 A043562

Adjacent sequences: A111623 A111624 A111625 this_sequence A111627 A111628 A111629

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 02 2005

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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