31031

Appears in sequences

• a(n) = 6^n - 5^n.at n=6A005062
• Duplicate of A005062.at n=6A016160
• Nexus numbers (n+1)^6 - n^6.at n=5A022522
• Sum of n-th powers of divisors of 144.at n=2A034675
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,1,0.at n=4A037666
• Gaps of 9 in sequence A038593 (lower terms).at n=22A038657
• Number of sticky functions: endofunctions of [n] having a fixed point.at n=5A045531
• Terms of A050530 with four prime divisors.at n=18A053340
• a(n) = Sum_{d|Fibonacci(n)} d^2.at n=11A063478
• Sum of squares of divisors of square numbers.at n=11A065827
• Numbers n such that sum of distinct primes dividing n is divisible by the largest prime dividing n. Also n is neither a prime, nor a true power of prime and n is squarefree. Squarefree solutions of A071140.at n=30A071141
• Numbers n such that (i) the sum of the distinct primes dividing n is divisible by the largest prime dividing n and (ii) n has exactly 4 distinct prime factors and (iii) n is squarefree.at n=12A071143
• Squarefree numbers k such that the largest prime factor of k is equal to the sum of the other prime factors of k.at n=29A071312
• Numbers whose name in American English is a word-palindrome, reading the same forward and backward.at n=39A081365
• Triangle of numbers defined by Knuth.at n=22A091884
• a(n) = n*(n+1)*(n+2)*(n+3)*(1+3*n+n^2)/120.at n=10A101094
• Number of sum of squares representations of n^2 in n dimensions disregarding order and sign.at n=19A105152
• Expansion of x*(1 + 5*x)/(1 - 2*x - 49*x^2).at n=5A123009
• Numerators of probabilities in the Newton-Pepys problem.at n=1A143162
• a(n) = 1001*n.at n=30A153814