40139

Appears in sequences

• Integers that do not appear in A103502.at n=20A103504
• a(n) = (p-1)! mod p^2 where p = n-th prime.at n=47A112660
• Irregular triangle read by rows: the number of hydrocarbon structures that can be drawn with a given number of carbons and units of unsaturation.at n=54A134819
• a(n) = 1331*n - 1122.at n=30A157441
• Number of (n+1)X(n+1) -10..10 symmetric matrices with every 2X2 subblock having sum zero and one or three distinct values.at n=8A211815
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 549", based on the 5-celled von Neumann neighborhood.at n=33A272844
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = -2, a(1) = 1, a(2) = 0, a(3) = 1.at n=22A295860
• (1/4) * number of ways to select 3 distinct collinear points from a square of grid points with side length n.at n=20A320540
• Number of ways to write n as an ordered sum of 7 primes (counting 1 as a prime).at n=28A341986