42029

Appears in sequences

• Numbers k such that sigma(k)-k = pi(sigma(k)).at n=5A090999
• Numbers k such that abs(RSA-2048 - 10^k) is prime, where RSA-2048 is the 617 decimal digit number A391940(54).at n=12A113932
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (-1, 1, 1), (0, 1, 1), (1, -1, -1)}.at n=11A148261
• Beach-Williams Pell numbers of type k^2 + 4.at n=12A212083
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 401", based on the 5-celled von Neumann neighborhood.at n=40A271805
• Numbers with two or more distinct prime factors such that the number and all its prime factors fall on a single straight line when they are plotted on a square spiral.at n=49A346294