30217

Appears in sequences

• Convoluted convolved Fibonacci numbers G_j^(7).at n=10A089094
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-0100-1111 pattern in any orientation.at n=10A146798
• G.f. A(x) satisfies: A(x)^2 = A( x^2*(1+x)/(1-x) ), with A(0) = 0.at n=17A259117
• Series expansion of (1 + 2x + 4x^2)/(1 - 3x - 5x^2).at n=7A276139
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 662", based on the 5-celled von Neumann neighborhood.at n=28A286759
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 662", based on the 5-celled von Neumann neighborhood.at n=29A286759
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 0, a(1) = 0, a(2) = 3, a(3) = 1.at n=20A295856
• Numbers n such that there is k < n for which A003557(k) = A003557(n), A048250(k) = A048250(n) and A173557(k) = A173557(n).at n=2A296087
• Two-column table read by rows: Primitive distinct pairs that have the same value of phi, sigma, and tau.at n=39A322688
• Products of three distinct strong primes.at n=28A363782
• a(n) = (1/phi(n)) * Sum_{j=1..n} Sum_{k=1..n} phi(n*j*k).at n=20A372668