91816

Appears in sequences

• a(n) = 9^n + 8^n - 1.at n=5A155663
• Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=8, k=0 and l=-1.at n=7A177165
• Numbers k such that 4^k - 5 is prime.at n=41A217348
• Number of partitions of 4 copies of n into distinct parts.at n=19A258282
• Number of words of length 3n such that the index set of occurring letters is {1, 2, ..., k}, all letters are introduced in ascending order, and the words can be built by repeatedly inserting triples into the initially empty word.at n=6A321031