22053

Appears in sequences

• a(n) = 16*n^2 + 4*n + 1.at n=37A082041
• p^2-p+1 central polygonal numbers with prime indices A002061(prime(n)).at n=34A119959
• floor((log(4)/log(3))^n).at n=43A140881
• 1-sequence of reduction of (3n-1) by x^2 -> x+1.at n=13A192310
• a(1) = 1; a(n+1) = Sum_{d|n} (-1)^(n/d+1)*d*a(d).at n=8A318600
• Intersection of A002061 and A016105.at n=33A370519
• a(n) is the number of ways to partition a square n X n into five rectangles of different dimensions, without any straight cut spanning the entire square.at n=25A384208