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A160181
a(n) is the total number of partitions of sets containing from 0 to n elements into blocks of at least 2 elements. It is the sum of the first n+1 terms of
A000296
.
+0
1
1, 1, 2, 3, 7, 18, 59, 221, 936, 4361, 22083, 120336, 700653, 4333933, 28345090, 195233255, 1411303635, 10675375402, 84276173439, 692752181561, 5917018378496, 52416910416933, 480786834535250, 4559132648864259
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.
AT&T Labs Research
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