23621

Appears in sequences

• a(n) = T(2n-1,n-2), T given by A026747.at n=6A026752
• Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 14 (most significant digit on right).at n=12A061967
• Products of three distinct happy primes A035497.at n=33A154717
• T(n,k)=number of nXk binary matrices with rows and columns each in strictly increasing order as binary numbers and all numbers unique.at n=49A180995
• T(n,k)=number of nXk binary matrices with rows and columns each in strictly increasing order as binary numbers and all numbers unique.at n=50A180995
• Number of integer partitions of prime(n) into a prime number of prime parts.at n=28A316154
• Number of 2-sided strip polyominoes with n cells and no holes.at n=15A333313
• Coefficients of the power series expansion at p=1 of the time constant C(-2,p) for last passage percolation on the complete directed acyclic graph, where the edges' weights are equal to 1 or -2 with respective probabilities p and 1-p.at n=17A373090