18958

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 78 ones.at n=22A031846
• Number of partitions satisfying cn(2,5) < cn(0,5) + cn(1,5) + cn(4,5) and cn(3,5) < cn(0,5) + cn(1,5) + cn(4,5).at n=37A039873
• Number of conjugacy classes in the symmetric group S_n with distinct cardinality.at n=43A073906
• Number of, not necessarily connected, regular simple graphs on n vertices with girth exactly 3.at n=12A198313
• Number of (n+1) X 5 binary arrays with consecutive windows of two bits considered as a binary number nondecreasing in every row and column.at n=11A202331
• Number of distinct sums of subsets of the first n squares {1,4,9,...,n^2}.at n=37A208531
• Expansion of psi(x^4) / f(-x) in powers of x where psi(), f() are Ramanujan theta functions.at n=34A226635
• Number of compositions of n into distinct parts with exactly five descents.at n=18A241724
• Number of partitions of prime(n) into n primes.at n=37A259254
• Number of (undirected) cycles in the n-triangular honeycomb acute knight graph.at n=9A289901
• The number of evenly tagged partitions: partitions of n elements together with an involution defined on the set of classes which has at most one fixed point, such that a class and its image have the same number of elements.at n=9A355194