26793

Appears in sequences

• Expansion of a modular function for Gamma_0(21).at n=23A002511
• a(n) is the n-th J_12-prime (Josephus_12 prime).at n=9A163792
• Row 5 of A277710: Positions of 5's in A264977; positions of 10's in A277330.at n=46A277715
• One-half of the number of lines through at least 2 points of an n X n grid of points.at n=22A331780
• a(n) is the sum of distinct sums of all subsets with two or more elements of {1, 2, ..., n}.at n=21A375764