A126338 - OEIS

A126338

a(n) = numerator of sum of the reciprocals of all terms in rows 1 through n of table A126336.

1, 2, 5, 7, 13, 59, 413, 3881, 405331, 2845313, 17135191, 274111423, 4924469, 105188, 5188129, 3877908109, 984131084791, 152077180227073, 17159732095214477, 2637696371523184, 12185515744595363

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OFFSET

1,2

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..150

MATHEMATICA

f[l_List] := Append[l, ContinuedFraction[Plus @@ (1/# &) /@ Flatten[l]]]; Numerator@ Table[Plus @@ (1/# &) /@ Flatten@ Nest[f, {{1}}, n - 1], {n, 22}] (* Ray Chandler, Dec 26 2006 *)

CROSSREFS

Cf. A126336, A126339.

Sequence in context: A348671 A265811 A265793 * A305993 A193718 A007438

Adjacent sequences: A126335 A126336 A126337 * A126339 A126340 A126341

KEYWORD

frac,nonn

AUTHOR

Leroy Quet, Dec 25 2006

EXTENSIONS

Extended by Ray Chandler, Dec 26 2006

STATUS

approved