18861
domain: N
Appears in sequences
- Centered 23-gonal numbers.at n=40A069174
- a(n) = Sum_{i=0..n} digsum_6(i)^4, where digsum_6(i) = A053827(i).at n=26A231675
- Positive integers m such that pi(m^2) = pi(j^2) + pi(k^2) for no 0 < j <= k < m.at n=49A262408
- Number of maximal irredundant sets in the n-pan graph.at n=24A291102
- Number of parts in all partitions of 2n with largest multiplicity n.at n=27A320381
- a(n) = Sum_{k=1..floor(n/2)} k * (n-k) * floor((n-k)/k).at n=41A339804
- a(n) is the number of squares strictly between Fibonacci(n) and Fibonacci(n+1).at n=48A350701
- G.f. A(x) satisfies A(x) = Sum_{k>=0} x^k * A(k^2*x).at n=6A385543