A087084
Number of integer elements in the subsets of the subsets of the integers 1 to n.
Original entry on oeis.org
0, 0, 2, 32, 1536, 1048576, 171798691840, 1770887431076116955136, 76223250190290215815795912064716079366144
Offset: 0
Alan Sutcliffe (alansut(AT)ntlworld.com), Aug 13 2003
a(3)=32 since the 16 subsets of the sets ( ) (1) (2) (1,2) are ( ) (( )) ((1)) ((2)) ((1,2)) (( ) (1)) (( ) (2)) (( ) (1,2)) ((1) (2)) ((1) (1,2)) ((2) (1,2)) (( ) (1) (2)) (( ) (1) (1,2)) (( ) (2) (1,2)) ((1) (2) (1,2)) (( ) (1) (2) (1,2)) and these contain 32 integer elements.
- Alan Sutcliffe, Divisors and Common Factors in Sets of Integers, awaiting publication.
A001146 gives the number of subsets of the subsets of the integers 1 to n.
A028369 gives the number of subset elements in the subsets of the subsets of the integers 1 to n.
A087085
Sum of the integer elements in the subsets of the subsets of the integers 1 to n.
Original entry on oeis.org
0, 0, 2, 48, 3072, 2621440, 515396075520, 6198106008766409342976, 304893000761160863263183648258864317464576
Offset: 0
Alan Sutcliffe (alansut(AT)ntlworld.com), Aug 13 2003
a(3)=48 since the 16 subsets of the sets ( ) (1) (2) (1,2) are ( ) (( )) ((1)) ((2)) ((1,2)) (( ) (1)) (( ) (2)) (( ) (1,2)) ((1) (2)) ((1) (1,2)) ((2) (1,2)) (( ) (1) (2)) (( ) (1) (1,2)) (( ) (2) (1,2)) ((1) (2) (1,2)) (( ) (1) (2) (1,2)) and the sum of the 32 integer elements is 48.
- Alan Sutcliffe, Divisors and Common Factors in Sets of Integers, awaiting publication.
A001146 gives the number of subsets of the subsets of the integers 1 to n.
A028369 gives the number of subset elements in the subsets of the subsets of the integers 1 to n.
A087084 gives the number of integer elements in the subsets of the subsets of the integers 1 to n.
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