124795

Appears in sequences

• a(0) = a(1) = 1. a(n) = a(n-1) + a(n - b(n)), where b(n) is smallest prime dividing n.at n=30A137808
• Number of vertices in truncated tetrahedron with faces that are centered polygons.at n=27A193218
• Fixed points of permutations A263265 and A263266.at n=24A263281
• Number of nX5 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=7A301881
• G.f.: Sum_{n>=0} x^n * (1 + x^n)^n / (1 - x + x^(n+1))^(n+1).at n=17A322619