497665

Appears in sequences

• Expansion of g.f. (1-sqrt(1-4*x-4*x^2))/(2*(1+x)).at n=12A052709
• Pierpont 4-almost primes: numbers with exactly 4 prime divisors, not necessarily distinct, of the form 2^K*3^L + 1.at n=10A111344
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k UDUDU's (n >= 0; 0 <= k <= n-2 for n >= 2).at n=47A128753
• Number of terms of A293630 at stage n.at n=16A291481