853914
domain: N
Appears in sequences
- Numbers n such that sigma(n+2) - sigma(n) = prime(n+2) - prime(n).at n=26A067058
- Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k nonincreasing cycles (0<=k<=floor(n/3)). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... .at n=24A186756