Decomposition of 5-almost primes
Numbers that are products of 5 primes (or 5-almost primes, a generalization of semiprimes).
Decomposition of A014688
a(n) = n-th prime + n.
Decomposition of A014847
Numbers n such that n-th Catalan number C(2n,n)/(n+1) is divisible by n.
Decomposition of A015614
Sum( phi(i), i=1..n) - 1.
Decomposition of A015911
Numbers n such that 2^n mod n is odd.
Decomposition of A016038
Strictly non-palindromic numbers: n is not palindromic in any base b with 2 <= b <= n-2.
Decomposition of A016052
a(1) = 3; for n >= 1, a(n+1) = a(n) + sum of its digits.
Decomposition of A016096
a(n+1) = a(n) + sum of its digits, with a(1) = 9.
Decomposition of 3n + 2
3n+2.
Decomposition of 4n + 2
Numbers congruent to 2 mod 4: a(n) = 4n+2.