18864

Appears in sequences

• Decimal part of a(n)^(1/3) starts with reversal of its integer part: first term of runs.at n=24A034309
• Denominators of convergents to Pi by Farey fractions.at n=34A063673
• Indices of primes in the sequence defined by A(0) = 47, A(n) = 10*A(n-1) - 33 for n > 0.at n=27A101724
• Sum of divisors of prime(n)! / prime(n)# + 1.at n=4A103895
• Second convolution of A111989.at n=4A111991
• a(n) = n^4 - n^3 - n^2.at n=12A132998
• Number of (w,x,y,z) with all terms in {1,...,n} and 3w = x + y + z + n + 1.at n=41A212251
• Records in A224796.at n=33A224719
• Number of pairs (x, y) with 0 <= x, y <= n such that the distance between two points is a positive integer.at n=22A228108
• Product between n-th prime and next perfect square.at n=31A229497
• a(n) = Sum_{i=0..n} digsum_7(i)^3, where digsum_7(i) = A053828(i).at n=60A231678
• L.g.f.: Sum_{n>=1} x^((2*n-1)^2) / ( (2*n-1) * (1 - x^(2*n))^(2*n-1) ).at n=65A293598
• Expansion of e.g.f. 1/(1 - arctanh(x)).at n=7A296676
• Number of compositions (ordered partitions) of n into distinct parts all relatively prime to n.at n=35A332002
• Number of permutations of [n] whose cycle minima sum to n.at n=9A368246