26128

Appears in sequences

• Reverse of largest prime factor of n = smallest prime factor of n+1; a(1)=1.at n=19A071393
• Number of partitions of n such that the set of even parts has only one element.at n=49A090867
• a(n) = n * (6*n^2 + 6*n + 1).at n=15A094421
• Site series for first parallel moment of 4.8 (bathroom tile) lattice.at n=29A120558
• Numbers n such that twice the sum of the prime factors of n equals the product of the digits of n.at n=34A125309
• 10^n-th number divisible by exactly 3 distinct primes.at n=3A143041
• Number of peakless Motzkin paths of length n having no (1,0)-steps at levels 0,2,4,... .at n=21A190165
• Number of (n+1) X 3 0..1 arrays with the permanents of 2 X 2 subblocks nondecreasing rightwards and downwards.at n=4A204717
• Number of (n+1)X6 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards.at n=1A204720
• T(n,k) = Number of (n+1) X (k+1) 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards.at n=16A204723
• T(n,k) = Number of (n+1) X (k+1) 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards.at n=19A204723
• Numbers k such that (7*10^k + 167)/3 is prime.at n=19A293758
• Practical numbers q with q + 2 and q^2 + 2 both practical.at n=13A294225
• Numbers k such that s(k) = s(k+1), where s(k) is A059975.at n=17A327250
• Numbers k such that the product of distinct digits of k equals the sum of the prime divisors of k.at n=32A357262