20531

Appears in sequences

• Number of 4 X 4 X 4 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.at n=36A166212
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 483", based on the 5-celled von Neumann neighborhood.at n=30A267829
• The difference between 10^n and the lesser of the twin primes immediately before.at n=47A327133
• a(n) is the number of edges formed by n-secting the angles of a heptagon.at n=31A335759
• Nonsquarefree numbers k such that A003415(k) divides A276086(k), where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.at n=34A371085
• Consecutive states of the linear congruential pseudo-random number generator 170*s mod 30323 when started at s=1.at n=12A385033