1,1
Inverse of A000009, the sequence of "restricted" partitions (partitions of integers into distinct parts).
Jean-François Alcover, Table of n, a(n) for n = 1..1000
q(12) = 15, therefore a(15) = 12.
a[n_] := For[k = 1, True, k++, If[PartitionsQ[k] > n, Return[k-1]]]; Table[a[n], {n, 100}]
Cf. A000009, A000041, A198194.
Sequence in context: A287076 A100006 A196262 * A195994 A182815 A196252
Adjacent sequences: A238458 A238459 A238460 * A238462 A238463 A238464
nonn
Jean-François Alcover, Feb 27 2014
approved