19943

Appears in sequences

• Numbers that are the sum of 8 nonzero 8th powers.at n=25A003386
• Expansion of Product_{m>=1} (1+m*q^m)^22.at n=4A022650
• a(n) is minimal such that prime factorizations of a(n)-n+1, ..., a(n) have same exponents.at n=3A034174
• Molien series for group G_{1,2}^{8} of order 1536.at n=35A051462
• Triangle read by rows in which the n-th row gives the smallest set of n consecutive numbers with the same prime signatures.at n=9A083785
• a(1) = 9, then the smallest number such that the forward as well as the reverse n-th partial concatenation is a prime for n>1. (Reverse concatenation is taken term-wise and not digit-wise).at n=37A083995
• Tetranacci numbers starting with first four cubes.at n=12A093322
• Number of partitions of 1 into distinct fractions i/j with 1<=i<j<=n and i,j coprime.at n=25A116084
• a(0) = 0, a(1) = 1; for n >= 2, a(n) = a(n-1) + a(n-2) - (n-1) if that number is positive and not already in the sequence, otherwise a(n) = a(n-1) + a(n-2) + (n-1).at n=23A117824
• Triangle T(n,k) by rows: T(n, k) = (n-k+1)*T(n-1, k-1) + k*T(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.at n=38A144438
• Triangle T(n,k) by rows: T(n, k) = (n-k+1)*T(n-1, k-1) + k*T(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.at n=42A144438
• Number of n-bead necklaces labeled with numbers 1..n not allowing reversal, with no adjacent beads differing by more than 1.at n=10A208771
• a(n) = n*(16*n^2 - 21*n + 7)/2.at n=14A260260
• Number of solutions to 1 +- 5 +- 12 +- ... +- n*(3*n-1)/2 = 0.at n=26A292475
• Number of pairs (lambda,mu) of partitions lambda of n and mu of nine with mu <= lambda (by diagram containment).at n=13A303859
• Numbers n with the property that k*n and (k+1)*n have a common nonzero digit for all k.at n=26A308466
• Positive numbers k such that k and k + 1 are both positive negaFibonacci-Niven numbers (A331085) and -k and -(k + 1) are both negative negaFibonacci-Niven numbers (A331088).at n=32A331092
• Number of partitions of n with rank 3 or higher (the rank of a partition is the largest part minus the number of parts).at n=41A363230