26247

Appears in sequences

• Numbers that are the sum of 7 nonzero 8th powers.at n=26A003385
• a(n) = a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2, and a(3) = 1.at n=39A050043
• a(n) = T(n,n-4), array T as in A055818.at n=23A055821
• Numbers n such that p = n^2 + 2, p+2 and p+6 are consecutive primes.at n=31A086380
• Whitney transform of Jacobsthal numbers.at n=11A103819
• Partial sums of A068148.at n=29A178137
• Numbers n such that n^2-9 is divisible by consecutive primes beginning with 2.at n=28A217277
• Number of partitions of n such that m(2) > m(3), where m = multiplicity.at n=42A240065
• Number of length-4 0..n arrays with no following elements larger than the first repeated value.at n=11A267472
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 291", based on the 5-celled von Neumann neighborhood.at n=34A271131
• Numbers k such that {k + 2, k + 4} and {k^2 + 2, k^2 + 4} are both twin prime pairs.at n=15A284014
• Numbers m such that 20*m + 1, 80*m + 1, 100*m + 1, and 200*m + 1 are all primes.at n=32A372186
• a(n) = Sum_{k=0..floor(n/2)} (k+1) * binomial(k,2*(n-2*k)).at n=29A392251