72772
domain: N
Appears in sequences
- Sort then Add, a(1)=19.at n=16A033900
- a(n) = floor(sqrt(a(n-1)^2 + a(n-2)^2)), a(1)=1, a(2)=3.at n=45A104803
- Sums of 2 successive primes s = prime(m) + prime(m+1) such that all digits of s are primes.at n=39A173719
- Members of a pair (m,k) such that sigma(m) = sigma(k) = sigma(m+k), m < k where sigma = A000203.at n=30A239436
- Subsequence of lesser of 2 terms of A095301 that are 2 apart.at n=24A248083
- Numbers k such that 4*R_k + 7*10^k + 3 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=9A259136
- Number of nX4 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.at n=2A265924
- T(n,k)=Number of nXk 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.at n=17A265928
- Number of 3Xn 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.at n=3A265931