43817

Appears in sequences

• Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-7).at n=25A023437
• Numbers k such that sigma(k) divides sigma(k+1), where sigma(k) is sum of positive divisors of k.at n=30A058072
• Numbers k such that sigma(k+1) = 2*sigma(k).at n=8A067081
• Numerators of the coefficients in exp(x/(1-x)) power series.at n=8A067764
• Number of compositions of n with first part 2 and no equal adjacent parts; this is column 2 of the array in A096568.at n=22A096570
• Number of length n+4 0..1 arrays with at most one downstep in every 4 consecutive neighbor pairs.at n=13A255988
• MM-numbers of crossing, capturing multiset partitions (with empty parts allowed).at n=33A326259
• a(0)=0; for n > 0, a(n) = 2*a(n-1) if n-1 is prime, a(n-1) + 1 otherwise.at n=47A354973
• a(n) is the number of sets of distinct four-cuboid combinations that fill an n X n X n cube excluding combinations that contain cube-shaped cuboids.at n=35A386756