31631

Appears in sequences

• Numerators of continued fraction convergents to sqrt(721).at n=12A042388
• Numbers k such that (61*10^k - 7)/9 is prime.at n=21A056718
• Number of nonisomorphic partitions of n on the Ferrers diagram.at n=43A095814
• Erroneous version of A100200.at n=12A151996
• Extra strong Lucas pseudoprimes.at n=7A217719
• Composite numbers k coprime to 13 such that k divides A006190(k-Kronecker(13,k)).at n=26A327653
• Composite numbers k coprime to 13 such that k divides A006190(k) - Kronecker(13,k).at n=31A327654
• Intersection of A327653 and A327654.at n=10A327655
• Odd composite integers m such that A006497(m) == 3 (mod m).at n=34A335669
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 3 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=3 and b=-1, respectively.at n=23A337626