login
A015724
Number of parts in all partitions of all the numbers in {1,2,...,n} into distinct parts.
5
1, 2, 5, 8, 13, 21, 31, 44, 62, 87, 117, 157, 206, 269, 349, 447, 566, 715, 894, 1112, 1378, 1696, 2076, 2531, 3072, 3712, 4472, 5367, 6417, 7651, 9093, 10772, 12732, 15004, 17639, 20691, 24211, 28265, 32934, 38293, 44435, 51470, 59507, 68677
OFFSET
1,2
FORMULA
Partial sums of A015723.
G.f.: (1/(1 - x)) * Sum_{i>=1} x^i/(1 + x^i) * Product_{j>=1} (1 + x^j). - Ilya Gutkovskiy, Apr 04 2017
CROSSREFS
Sequence in context: A169952 A025279 A169954 * A290133 A089897 A076180
KEYWORD
nonn
EXTENSIONS
Corrected by Vladeta Jovovic, Dec 03 2004
STATUS
approved