25157

Appears in sequences

• Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 20.at n=32A050969
• Records in A111229.at n=37A111270
• Semiprimes (A001358) whose digit reversal is a pentagonal number (A000326).at n=32A115708
• Number of sets of nonempty words with a total of n letters over binary alphabet containing the second letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.at n=12A293883
• Number of partitions of n^2 into distinct squares > 1.at n=47A298642
• Partial sums of A299283.at n=24A299284
• Number of series-reduced rooted trees whose leaves are non-singleton integer partitions whose multiset union is an integer partition of n with no 1's.at n=24A320294
• G.f. A(x) satisfies: 1 = Sum_{n>=0} ((1+x)^(4*n) - A(x))^n.at n=4A321604
• Numbers of graphs which are double triangle descendants of K_5 with four more vertices than triangles.at n=36A332735
• Number of strict compositions of n with all adjacent parts (x, y) satisfying x < 2y and y < 2x.at n=56A342341
• a(n) is the total number of runs of descents over all flattened Catalan words of length n.at n=8A372874