23194

Appears in sequences

• a(1)=1. a(n) = a(n-1) + sum of the triangular numbers which are among the first (n-1) terms of the sequence.at n=39A100963
• Number of length 2+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=20A248539
• Composite numbers k such that phi(x) = psi(k)*phi(k) has no solution.at n=17A292714
• E.g.f. satisfies A(x) = 1/(1 + A(x)^3 * log(1 - x*A(x)^3)).at n=4A377497
• G.f. A(x) satisfies A(x) = 1 + x*(1+x^3)^2*A(x)^2.at n=10A389873