1771560

Appears in sequences

• a(n) = 11^n-1.at n=6A024127
• Jordan function J_6(n).at n=10A069091
• a(n) = n^6 - 1.at n=10A123866
• Numbers such that the two adjacent integers are a perfect cube and a prime.at n=22A164834
• a(n) = Sum_{d|n, n/d==1 mod 4} d^6 - Sum_{d|n, n/d==3 mod 4} d^6.at n=10A321830
• Numbers k such that either (a) k-1=i^m for some i and m >= 3 and k+1 is a prime, or (b) k-1 is a prime and k+1 = i^m for some i and m >= 3.at n=39A329595
• a(n) is the smallest number with exactly n divisors that are Moran numbers, or -1 if no such number exists.at n=24A333457
• Values of records in A368698.at n=21A368989
• Triangular array T(n,k) read by rows: column k is the expansion of e.g.f: exp(-2*x)*(exp(x)-1)^k/(2-exp(x)).at n=47A372245
• Even positive numbers that are one less than the square of a perfect power.at n=21A389955