63141

Appears in sequences

• Successively larger 3-ball 'prime' ground-state site swaps of A084521 in concatenated decimal notation.at n=33A084522
• Expansion of 1/(x^k*(1-x-2*x^(k+1))) for k=9.at n=44A143452
• a(n) = n*(2*n^2 + 5*n + 1)/2.at n=38A162254
• Numbers k such that sum of 4th power of digits of k equals the sum of prime divisors of k.at n=7A217532
• a(n) is the number of equivalence classes of simple, open polygonal chains consisting of two segments and with all three vertices on the lattice points of an n X n grid.at n=18A272053
• Array read by antidiagonals: the number of directed elements with area n on the lattice T_{2k+1}.at n=60A296129