43270

Appears in sequences

• Number of equivalence classes of 4 X n binary matrices when one can permute rows, permute columns and complement columns.at n=20A006380
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2, and a(3) = 1.at n=17A049902
• Number of integer partitions of n of whose permutations do not all have distinct runs.at n=41A351203