61770

Appears in sequences

• Shifts left under inverse Euler transform.at n=41A038071
• Triangle, T(n, k) = Sum_{j=0..k} (-1)^j*(n+k)!/((n-j)!*(k -j)!*j!) + Sum_{j=0..n-k} (-1)^j*(2*n-k)!/((n-j)!*(n-k-j)!*j!), read by rows.at n=31A176093
• Triangle, T(n, k) = Sum_{j=0..k} (-1)^j*(n+k)!/((n-j)!*(k -j)!*j!) + Sum_{j=0..n-k} (-1)^j*(2*n-k)!/((n-j)!*(n-k-j)!*j!), read by rows.at n=32A176093
• Places n such that the two remainders A187680(n) and A191906(n) are both zero.at n=24A192853
• Expansion of Product_{k>=1} 1/(1 - k*(x^(2*k-1))).at n=31A266137
• Numbers k such that (101*10^k + 1)/3 is prime.at n=24A275978
• Numbers k such that (424*10^k - 1)/9 is prime.at n=20A295626
• Number T(n,k) of sets of n words of length n over binary alphabet where the first letter occurs k times; triangle T(n,k), n>=0, n-signum(n)<=k<=n*(n-1)+signum(n), read by rows.at n=45A360693