285086

Appears in sequences

• Triangle read by rows: T(n,k) is the number of self-avoiding paths of length n-1+2*k from NW to SW corners in the n X n grid graph (0 <= k <= A000217(n-1), n >= 1).at n=36A329633
• Semiprime numbers that are sandwiched between products of exactly 4 distinct primes (or tetraprimes).at n=29A375964