63872

Appears in sequences

• Compositions: 6th column of A048004.at n=14A006980
• Numbers k such that phi(k) + 3 | sigma(k).at n=7A015792
• Number of 2 X 2 non-singular integer matrices with entries from {0,...,n}.at n=15A062801
• Triangular array with the first half of the odd-indexed rows of A048004.at n=50A125105
• Total number of restricted right truncatable primes in base n.at n=40A133757
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, -1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.at n=8A150851
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 547", based on the 5-celled von Neumann neighborhood.at n=39A272840
• Number of Hamiltonian circuits within parallelograms of size 3 X n on the triangular lattice.at n=9A339850
• Factorial base Niven numbers (A118363) with a record gap to the next factorial base Niven number.at n=21A347495
• a(n) is the index where A387090(n) appears in A386482.at n=50A386484