24250

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 61.at n=36A020400
• INVERTi transform of A141308.at n=5A141309
• Triangle of Arnold L(b) for Springer numbers.at n=30A256665
• a(n) = Sum_{d|n} tau(d^n), where tau() is the number of divisors (A000005).at n=47A321348
• Iterate function composition by applying y=abs(x) or y=x-1. a(n) is the number of functions at distance n from the identity (y=x) in the graph of all possible results.at n=23A334738
• a(n) = 4*a(n-1) - 2*a(n-2) + a(n-3) - 4*a(n-4) + a(n-5) for n >= 6, where a(1) = 1, a(2) = 3, a(3) = 5, a(4) = 16, a(5) = 53.at n=9A339828