25999

Properties

Appears in sequences

• Number of 2n-step polygons on honeycomb.at n=15A006774
• Expansion of g.f. 1/((1-2*x)*(1-5*x)).at n=6A016127
• Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 5).at n=51A035563
• Primes related to the nondecreasing subsequence of A053666.at n=42A069802
• Smallest prime q of form q=-1+(c+1)*10^w, where c runs through composites not divisible by 3.at n=7A073928
• a(n)=60*sum(1<=i<=j<=k<=n,i*j^2/k).at n=6A088943
• Indices of primes in sequence defined by A(0) = 31, A(n) = 10*A(n-1) + 51 for n > 0.at n=19A101839
• Indices of primes in sequence defined by A(0) = 19, A(n) = 10*A(n-1) - 11 for n > 0.at n=10A102028
• Array read by antidiagonals: T(n, k) = ((n+2)^k-(n-1)^k)/3.at n=62A102752
• Primes with digit sum = 34.at n=3A106769
• New factors appearing in the factorization of 5^k - 2^k as k increases.at n=6A109291
• Least prime whose absolute difference between the sum of its even decimal digits and the sum of its odd decimal digits is n.at n=30A114442
• Primes of form (5^n - 2^n)/3.at n=2A139781
• Smaller member of a pair (p,q) of cousin primes such that p and q are in different centuries.at n=25A160440
• Primes containing 999 as a substring.at n=8A167292
• Primes which are the sum of three distinct positive cubes in two or more distinct ways.at n=22A180088
• Number of subsets of {1, 2, ..., n} containing n and having <=8 pairwise coprime elements.at n=30A186992
• Primes of the form 2n^2 + 7.at n=12A201475
• Primes of the form 8*k^2 + 7.at n=6A201704
• Triangle read by rows, S_3(n, k) where S_m(n, k) are the Stirling-Frobenius subset numbers of order m; n >= 0, k >= 0.at n=29A225468