121045

Appears in sequences

• Spiral sieve using Fibonacci numbers.at n=24A005622
• Numbers k such that k through k+4 all have the same number of divisors.at n=23A049051
• Number of solutions to rev(x^2) = rev(x)^2 with n digits, where the rev(x) function reverses the digits of x.at n=14A098701
• The number of permutations of length n sortable by 2 block transpositions.at n=14A228392
• Number of odd p-trees of weight n (all proper terminal subtrees have odd weight).at n=24A300436
• Number of maximum irredundant sets in the n-antiprism graph.at n=42A304567
• Number of p-trees of weight 2n + 1 in which all outdegrees are odd.at n=12A318485