26369
domain: N
Appears in sequences
- Average of three successive primes squared, (prime(n)^2+prime(n+1)^2+prime(n+2)^2)/3, n>=3.at n=34A075893
- Expansion of (1-x)^(-1)/(1-2*x+2*x^3).at n=21A077853
- Expansion of (1-x)^(-1)/(1-2*x+2*x^3).at n=22A077853
- Number of distinct products i*j*k*l for 1 <= i < j < k < l <= n.at n=44A100438
- Numbers k such that 13^k - 2 is a prime.at n=16A128457
- Semiprimes in A007504 (the sum of first n primes).at n=27A189072
- Number of nX2 0..2 arrays with every row and column running average nondecreasing rightwards and downwards but some diagonal running average having a decrease.at n=11A201189
- a(0)=1, a(1)=4; thereafter a(n) = 13*4^n/8-2^(n+1)+1.at n=7A256959
- The sum S of the maximum number of consecutive primes starting with 2 such that S <= prime(n)^2.at n=37A346134
- Zeroless analog of tribonacci numbers.at n=30A371911
- Zeroless analog of tribonacci numbers.at n=45A371911