A233758 - OEIS

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A233758

Bisection of A006950 (the even part).

1, 1, 3, 5, 10, 16, 28, 43, 70, 105, 161, 236, 350, 501, 722, 1016, 1431, 1981, 2741, 3740, 5096, 6868, 9233, 12306, 16357, 21581, 28394, 37128, 48406, 62777, 81182, 104494, 134131, 171467, 218607, 277691, 351841, 444314, 559727, 703002, 880896, 1100775

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OFFSET

1,3

COMMENTS

See Zaletel-Mong paper, page 14, FIG. 11: C2a is this sequence, C2b is A233759, C2c is A015128.

LINKS

Table of n, a(n) for n=1..42.

M. P. Zaletel and R. S. K. Mong, Exact Matrix Product States for Quantum Hall Wave Functions, arXiv preprint arXiv:1208.4862 [cond-mat.str-el] (2012), 14 (C2a).

MATHEMATICA

b[n_, i_] := b[n, i] = If[n == 0, 1, If[i < 1, 0, b[n, i - 1] + If[i > n, 0, b[n - i, i - Mod[i, 2]]]]];

a[n_] := b[2 n - 2, 2 n - 2];

Table[a[n], {n, 1, 42}] (* Jean-François Alcover, Dec 11 2018, after Alois P. Heinz in A006950 *)

CROSSREFS

Cf. A000009, A015128, A006950, A069910, A069911, A195825, A195836, A211970, A233759.

Sequence in context: A209008 A032279 A070558 * A301653 A253769 A070559

Adjacent sequences: A233755 A233756 A233757 * A233759 A233760 A233761

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jan 11 2014

STATUS

approved