30975

Appears in sequences

• Number of partitions satisfying 0 < cn(0,5) + cn(1,5) + cn(4,5).at n=39A039900
• a(n)= product of all odd composite numbers between n-th prime and (n+1)-st prime.at n=39A061215
• A partition product of Stirling_2 type [parameter k = 1] with biggest-part statistic (triangle read by rows).at n=32A157401
• Number of nondecreasing integer sequences of length 29 with sum zero and sum of absolute values 2n.at n=14A158163
• a(n) = 64*n^2 - 1.at n=21A158684
• a(n)=2(4^n-n*2^n)-1.at n=7A186942
• Number of nonempty subsets of {1, 2, ..., n} having pairwise coprime elements.at n=28A187106
• The Wiener index of the comb-shaped graph |_|_|...|_| with 2n (n>=1) nodes. The Wiener index of a connected graph is the sum of the distances between all unordered pairs of vertices in the graph.at n=34A192023
• Numbers k such that tau(k+1) - tau(k) = 3, where tau(k) = the number of divisors of k (A000005).at n=12A230653
• Bases in which 11 is a unique-period prime.at n=33A306076
• Numbers k such that k and k+1 are both phi-practical numbers (A260653).at n=34A330871