18232

Appears in sequences

• Coordination sequence for alpha-Mn, Position Mn4.at n=35A009953
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones.at n=10A031789
• Engel expansion of exp(e).at n=25A096194
• 4 times heptagonal numbers: a(n) = 2*n*(5*n-3).at n=43A153784
• Sophie Germain 5-almost primes.at n=36A211162
• a(n) = sum of all divisors of all positive integers <= prime(n).at n=34A244583
• a(n) = (2*n-1)*a(n-1) + (n-1)*a(n-2) with a(0) = a(1) = 1.at n=6A247249
• Number of length n+3 0..2 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=6A249284
• T(n,k) = Number of length n+3 0..k arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=34A249290
• Number of length 7+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=1A249297
• Consider any concatenation of the type n = concat(a,b). Sequence lists numbers that are the sum of the products of some of such couples a and b.at n=29A265737
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 324", based on the 5-celled von Neumann neighborhood.at n=43A271257
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 641", based on the 5-celled von Neumann neighborhood.at n=23A273311
• Number of overpal-free binary words of length n.at n=34A277277