32060

Appears in sequences

• Numerators of continued fraction convergents to sqrt(401).at n=2A041760
• Sum of terms of n-th group in A075383.at n=27A075386
• Numbers k such that 7^k - 5^k + 1 is prime.at n=4A180745
• Number of n X n 0..3 matrices with row and column i=1..n having sum <= i*3.at n=2A213957
• T(n,k)=Number of n X n 0..k matrices with row and column i=1..n having sum <= i*k.at n=12A213962
• Number of 3X3 0..n matrices with row and column 1..3 having sum <= i*n.at n=2A213963
• a(n) = n*(n^2 + 3)/2.at n=40A229183
• a(1)=1, a(2)=2; thereafter a(n) = a(n-1) + a(n-1-(number of even terms so far)) + a(n-1-(number of odd terms so far)).at n=48A249039
• Numbers n such that n^2 is a sum of 2 and also of 4 consecutive primes.at n=29A252066
• Numbers n such that n^2 + 1 has two distinct prime divisors less than n.at n=28A263876
• a(n) = Sum_{k=1..n} (-1)^(n-k) * Stirling1(n,k) * (k-1)! * sigma_2(k), where sigma_2 = A001157.at n=5A330495