281646

Appears in sequences

• Number of compositions of n with first part 4 and no equal adjacent parts; this is column 4 of the array in A096568.at n=27A096572
• Number of binary strings of length n with equal numbers of 0001 and 1010 substrings.at n=20A164163
• Number of length n+3 0..5 arrays with some disjoint pairs in every consecutive four terms having the same sum.at n=10A247530