A321397 a is the limit of A321396.

0, 1, 0, 1, 1, 3, 3, 10, 10, 32, 37, 105, 131, 364, 464, 1269, 1690, 4478, 6163, 16070, 22582, 58197, 83431, 212337, 309890, 780706, 1155906, 2888189, 4331109, 10739640, 16291293, 40123020, 61483211, 150518418, 232754753, 566704138, 883597884, 2140614523

Offset

0,6

Comments

The sequence a is the limit of the square array A321396 means, that for every fixed k the terms in column k of A321396 differ from a(k) only for finitely many indices.

Links

Table of n, a(n) for n=0..37.

Mathematica

terms = 38; gf[-1] = 1; gf[n_] := gf[n] = (1-Sqrt[1-4z^2 gf[n -1]])/(2z);
row[n_] := row[n] = gf[n]/z^n + O[z]^terms // CoefficientList[#, z]&;
row[n = 1]; row[n++]; While[Print[n]; row[n] != row[n-1], n++];
A321397 = row[n] (* Jean-François Alcover, Dec 08 2018 *)

Crossrefs

Cf. A321396.

Sequence in context: A073709 A085288 A124630 * A128015 A233256 A332955

Adjacent sequences: A321394 A321395 A321396 * A321398 A321399 A321400

Keyword

nonn

Author

Peter Luschny, Nov 11 2018

Status

approved