107660

Appears in sequences

• Positive numbers k such that k and 7*k are anagrams in base 9 (written in base 9).at n=8A023084
• Triangle read by rows: entries give numbers of permutations of [1..n] by absolute barycenter.at n=42A062867
• Compound filter (summands of A004001 & summands of A005185): a(n) = P(A286541(n), A286559(n)), where P(n,k) is sequence A000027 used as a pairing function, with a(1) = a(2) = 0.at n=39A286560