174765

Appears in sequences

• a(n) = 1^2 + prime(1)^2 + prime(2)^2 + ... + prime(n)^2.at n=33A024525
• Cototient of 2^n + 1.at n=19A053286
• a(n) = (7 - 4*(-2)^n)/3.at n=17A083594
• Triangle of sums of Jacobsthal numbers related to binomial(4n,n)/(3n+1) mod 4.at n=37A113049
• Sum of the distinct prime factors of 2^n-1.at n=34A152057
• Jacobsthal numbers A001045 incremented by 2.at n=19A153643
• First differences of A135351.at n=21A155980
• a(n) = (2*2^n+7*(-1)^n)/3.at n=18A171382
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 774", based on the 5-celled von Neumann neighborhood.at n=9A273503
• a(n) = (2*4^n + 7)/3.at n=9A321358