129033

Appears in sequences

• Numbers k such that k and 7*k are anagrams.at n=27A023091
• Ordered factorizations with one level of parentheses indexed by prime signatures. A050354(A025487).at n=41A050355
• Counts where both the odd composites (starting from 1) 1 mod 4 and 3 mod 4 are equal.at n=29A093182
• Expansion of 1/sqrt(1 - 6x + 21x^2).at n=9A098340
• First differences of A140495.at n=45A142716