39041

Properties

Appears in sequences

• Centered 4-dimensional orthoplex numbers (crystal ball sequence for 4-dimensional cubic lattice).at n=15A001846
• Quartan primes: primes of the form x^4 + y^4, x > 0, y > 0.at n=22A002645
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 15.at n=29A031603
• Expansion of (1+x^2)*(1+x^5)/( Product_{j=1..7} (1-x^j) ).at n=47A060962
• Number of nodes in virtual, "optimal", chordal graphs of diameter 4 and degree n+1.at n=28A067956
• Primes p such that p*(p-1) divides 3^(p-1)-1.at n=32A081763
• Primes p such that p-1 and p+1 are both divisible by fourth powers.at n=24A086709
• Primes of the form 256n+129.at n=33A105130
• Primes which are the fourth element of a generalized Wieferich sequence.at n=14A179400
• Primes which are the fifth element of a generalized Wieferich sequence.at n=7A179678
• Pythagorean primes p such that for all primes q < p, p XOR q is not equal to p - q.at n=34A197918
• Primes of the form 384*k + 257.at n=31A229856
• Primes of form n^2 + 625.at n=39A256777
• Triangle read by rows: T(n,k) (for 0 <= k <= floor(n/2)) is the number of permutations of length n that have k descents and avoid the patterns 321 and 2341.at n=61A304429
• Primes p such that p+2, (p+1)||p and (p+1)||(p+2) are primes (where || denotes concatenation in base 10).at n=35A309934
• Number of irreducible conic curves containing 6 points of a cyclic order n-torsion subgroup of an elliptic curve.at n=27A379920
• Prime numbersat n=4110