A212658 Number of multisets {1^k1, 2^k2, ..., n^kn}, ki >= 0, with the sum of reciprocals <= 1.

1, 2, 4, 8, 17, 37, 86, 199, 475, 1138, 2769, 6748, 16613, 40904, 101317, 251401, 624958, 1555940, 3882708, 9701790, 24276866, 60817940, 152508653, 382828565, 961859364, 2418662434, 6086480305, 15327208770, 38622901484, 97384378728, 245686368946, 620158662562

Offset: 0

Author

Max Alekseyev, May 23 2012

Keywords

• nonn

Comments

The number of distinct sums of reciprocals is given by A212606.

Links

• Dexter Senft, Table of n, a(n) for n = 0..36

Crossrefs

Cf. A212657, A212606, A212607, A020473, A092669, A092671, A208480, A003418.

Extensions

a(24)-a(25) from Alois P. Heinz, Nov 20 2017

a(26)-a(31) from Dexter Senft, Feb 07 2019