A111626 - OEIS

A111626

T(2n, n)/n of A109626.

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; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..80.

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: A043535 A043560 A276034 * A297777 A043536 A043561

Adjacent sequences: A111623 A111624 A111625 * A111627 A111628 A111629

KEYWORD

nonn

AUTHOR

Paul D. Hanna and Robert G. Wilson v, Aug 02 2005

STATUS

approved