38697

Appears in sequences

• Number of different absolute values of vector sums generated by n vectors chosen from 2n (equally spaced) points around the unit circle. Dipole moments of n positive and n negative equally spaced charges on a circle.at n=13A077078
• Numbers k such that 3^k - phi(k) is prime.at n=17A109889
• Number of separable partitions of n; see Comments.at n=42A325534