210448

Appears in sequences

• Number of binary strings of length n with equal numbers of 000 and 001 substrings.at n=20A164137
• Second order complementary Bell numbers.at n=15A265023
• Triangle read by rows: T(n,k) = number of collections of up to k subsets of [n] covering [n], with [0]={}; n>=0, k=0..2^n.at n=41A381683