24992

Appears in sequences

• a(2n) = a(2n-1) + 2a(2n-2), a(2n+1) = a(2n) + a(2n-1), with a(1) = 2 and a(2) = 3.at n=16A001882
• Number of points on the surface of 5-dimensional cube.at n=7A008512
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 79.at n=34A031577
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 6 and 9.at n=21A136905
• Numbers expressible as the difference of two nonnegative fifth powers.at n=30A152045
• a(n) = ((4+sqrt(2))*(2+sqrt(2))^n + (4-sqrt(2))*(2-sqrt(2))^n)/4.at n=8A161941
• Difference of two positive 5th powers.at n=23A181124
• Total number of parts k in all partitions of n such that k does not divide n.at n=28A209313
• a(n) = sigma(2*n^4) - sigma(n^4).at n=9A224903
• Union of all unique coefficients of all powers of the g.f. A(x) of this sequence, starting with A(0)=2 and A'(0)=3.at n=72A262975
• Numbers k such that (209*10^k - 17)/3 is prime.at n=20A286176
• Expansion of Product_{k>=1} ((1 - k*x^k) / (1 + k*x^k))^k.at n=15A305745
• Indices of primes followed by a gap (distance to next larger prime) of 44.at n=31A320720
• a(n) = A000203(A276086(n)).at n=56A324653