54335

Appears in sequences

• Array T(n,k) = number of subgroups of index k in free group of rank n, read by antidiagonals.at n=24A049290
• Number of subgroups of index n in free group of rank 4.at n=3A049291
• Number of subgroups of index 4 in free group of rank n+1.at n=3A049295
• Numbers k such that k^2 contains only digits {2,5,9}.at n=12A053928
• Number of subgroups of index n in free group of rank n.at n=3A057014
• Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 9.at n=16A137070
• Numbers k with squares that are concatenations k^2 = x//y such that x is an anagram of y.at n=19A162945
• Numbers k such that k!6 - 24 is prime, where k!6 is the sextuple factorial number (A085158).at n=36A289697