51661

Appears in sequences

• Strong pseudoprimes to base 59.at n=34A020285
• Numbers having four 7's in base 9.at n=29A043484
• Frobenius number of the numerical semigroup generated by three consecutive pyramidal numbers.at n=10A069762
• Number of intersection points of all lines through pairs of vertices of a regular n-gon.at n=27A146212
• n^3 + 4*n^2 - 5*n + 1.at n=36A241577
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 157", based on the 5-celled von Neumann neighborhood.at n=41A270331
• A146212(2*n).at n=13A347321
• Number of vertices in graph G_n formed by taking a regular n-gon with all its chords extended to infinity (the n-th graph in A344857) and inverting it in its circumscribing circle.at n=27A383461