19263

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 92.at n=37A031590
• Engel expansion of the Landau-Ramanujan constant K (A064533).at n=10A096190
• G.f.: Sum_{n>=0} Product_{k=1..n} Series_Reversion( x/(1 + x^k) ).at n=20A206290
• Number of length n+6 0..2 arrays with at most one downstep in every 6 consecutive neighbor pairs.at n=5A255105
• Number of length n+6 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=5A255113
• Sum_{ i in 1..p-1, j in 1..p-1, i*j mod p = 1} i*j, where p = n-th prime.at n=13A272650
• Number of vertices in a Y-shaped polygon with equal arms of length n (see the Comments in A335861 for definition).at n=12A337790