|
|
|
|
|
OFFSET
|
0,1
|
|
COMMENTS
|
Partial sums of Dedekind numbers. Partial sums of number of monotone Boolean functions of n variables (increasing functions from P(S), the set of subsets of S, to {0,1}). Partial sums of number of antichains of subsets of an n-set. The subsequence of primes in this partial sum begins: 2, 5, 11, 31, 199 is prime (5 in a row, then no more known).
|
|
LINKS
|
|
|
FORMULA
|
|
|
EXAMPLE
|
a(4) = 2 + 3 + 6 + 20 + 168 = 199 is prime.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|