49644

Appears in sequences

• Integers k for which 1 + A094125(k) = 1 + 3*2^k + 2*3^k is prime.at n=24A095378
• 6-almost primes with semiprime digits (digits 4, 6, 9 only).at n=12A111730
• Let P be Pascal's triangle A007318 and let N be Narayana's triangle A001263, both regarded as lower triangular matrices. Sequence gives triangle obtained from P*N, read by rows.at n=49A126182
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k UU's (doublerises) (n >= 1; 0 <= k <= n-1).at n=50A128718
• A triangle of infinite sum coefficients with: Limit[Log[1-x],x->0]=-x: p(x,y)=1+n!*x^(n - 1)*Sum[x^k/(k*Binomial[n + k, k]), {k, 1, Infinity}]; such that Log[1-x]->-x.at n=33A157047
• Triangle read by rows: labeled trees counted by improper edges.at n=24A217922
• Number of (n+2) X (3+2) 0..1 arrays with every 2 X 2 and 3 X 3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=18A253505
• Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k L-shaped corners (n>=2, k>=0).at n=53A273717
• E.g.f.: x^2/(x+3-2*exp(x)).at n=7A292934
• Expansion of e.g.f. -log(1 - 3*x)/(3 * (1 - x)).at n=6A384200