26411

Appears in sequences

• Numbers of the form 7^i*11^j.at n=16A003599
• a(n) = (2*n+1)*(9*n+1).at n=38A033573
• Denominators of continued fraction convergents to sqrt(138).at n=10A041253
• a(1)=5; for n >= 2, if n = Product p_i^e_i, then a(n) = Product p_{i+3}^e_i.at n=47A045968
• Numerators of row 4 of table described in A051714/A051715.at n=48A051722
• Numbers n such that n | 12^n + 11^n + 10^n + 9^n + 8^n + 7^n + 6^n + 5^n + 4^n + 3^n + 2^n.at n=17A057290
• Expansion of series related to Liouville's Last Theorem: g.f. sum_{t>0} (-1)^(t+1) *x^(t*(t+1)/2) / ( (1-x^t)^6 *product_{i=1..t} (1-x^i) ).at n=14A059823
• Numbers n such that z(n) and z(n+1) are both prime, where z(n) = a^d + b^d + c^d + ..., where a*b*c* ... is the prime factorization of n and d is the largest digit of n.at n=19A109280
• Composite numbers k that divide 3^k - 2^k - 1, excluding powers of 2, 3 and 7.at n=36A127073
• a(n) = 1331*n - 209.at n=19A157444
• Numbers which can be expressed as the product of numbers made of only sevens.at n=13A161145
• Totally multiplicative sequence with a(p) = 4p-1 for prime p.at n=47A166653
• a(n) = n*(n + 1)*(17*n - 14)/6.at n=21A237617
• Fixed points of A153212: After a(1) = 1, numbers of the form p_i1^i1 * p_i2^(i2-i1) * p_i3^(i3-i2) * ... * p_ik^(ik-i_{k-1}), where p_i's are distinct primes present in the prime factorization of n, with i1 < i2 < i3 < ... < ik, and k = A001221(n) and ik = A061395(n).at n=29A242421
• Number of tilings of a 4 X n rectangle using tetrominoes of shapes L, Z, O.at n=10A242636
• Iterates of A234742, starting from value a(0) = 23, with a(1) = A234742(a(0)), a(2) = A234742(a(1)), etc.at n=7A244323
• Sum of the areas of all modified skew Dyck paths of semilength n.at n=7A274373
• Largest proper divisor of A324886(n).at n=29A324896
• Heinz numbers of integer partitions such that the difference between the length of the minimal square containing and the maximal square contained in the Young diagram is 1.at n=40A325179
• a(n) is the first occurrence of n in A334200.at n=21A334199