47170

Appears in sequences

• Take pairs (a, b), sorted on a, such that T(a)+T(b)=concatenation of a and b, where T(k) is the k-th triangular number A000217(k). Sequence gives values of a.at n=35A096031
• Number of length n+4 0..7 arrays with every five consecutive terms having four times some element equal to the sum of the remaining four.at n=8A249655
• Numbers k with Goldbach partitions (p,q) and (r,s) such that k | (p*q -1) and k | (r*s +1).at n=5A336584