18672

Appears in sequences

• Molien series for Conway group Con.0.at n=39A008925
• Numbers k such that k*2^k - k - 1 is prime.at n=23A046843
• Number of pairs of rabbits in month n in the dying rabbits problem, if they become mature after 4 months and give birth to exactly 7 pairs, one per month.at n=34A160333
• Potential magic constants of a 10 X 10 magic square composed of consecutive primes.at n=23A192087
• Number of nX3 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=4A223994
• T(n,k)=Number of nXk 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=25A223999
• Number of 5Xn 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=2A224003
• Cardinality of Image^inf({ 2 }) under repeated base-n zero-split doubling.at n=21A254638
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 347", based on the 5-celled von Neumann neighborhood.at n=29A271299
• Numbers k such that sopfr(k) = tau(k)^2.at n=15A305026
• Number of aperiodic matrices of size n whose entries cover an initial interval of positive integers.at n=5A323869
• a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(k+2,2) * binomial(k,n-k)^2.at n=5A391678