24769

Appears in sequences

• a(n)=a(n-1)+a(n-2)-d, where d=a(n/2) if n is even, else d=0; 2 initial terms.at n=25A050192
• (k^2)-th k-smooth number for k = prime(n).at n=21A133581
• Number of partitions of n containing a clique of size 1.at n=38A183558
• Principal diagonal of the convolution array A213841.at n=16A213842
• a(n) = 1+2*(d1 + 1)*(d2 + 1)*...*(dk + 1), where d1, d2, ..., dk are the prime factors of the n-th Fermat pseudoprime to base 2 A001567(n).at n=20A216646
• Composite squarefree numbers k such that p+1 divides k-1 for any prime p dividing k.at n=5A225711
• Number of partitions p = [x(1), ..., x(k)], where x(1) >= x(2) >= ... >= x(k), of n such that max(x(i) - x(i-1)) < number of parts of p.at n=39A241828
• Number of distinct hook length sets of partitions of n.at n=47A301512
• Composite numbers k coprime to 13 such that k divides A006190(k-Kronecker(13,k)).at n=21A327653
• Composite numbers k coprime to 13 such that k divides A006190(k) - Kronecker(13,k).at n=27A327654
• Intersection of A327653 and A327654.at n=8A327655
• Odd composite integers m such that A006497(m) == 3 (mod m).at n=30A335669
• Odd composite integers m such that A087130(m) == 5 (mod m).at n=37A335671
• 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=20A337626
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 5 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=5 and b=-1, respectively.at n=22A337628
• T(n,m) is the denominator of the resistance between two nodes located at the end of a side of length n of a rectangular electric network of n*m quadratic meshes in which all edges are replaced by one-ohm resistors, where T(n,m) is a square array read by descending antidiagonals.at n=34A357116
• Centered triangular numbers which are products of three distinct primes.at n=15A359624
• Truncated hex numbers: a(n) = 24*n^2 + 6*n + 1.at n=32A381424
• Triangle a(n,k) read by antidiagonals: a(n,k) is the number of dots in the k-augmented centered triangle of order n, k>=0, n>=1.at n=37A385108
• Triangle a(n,k) read by antidiagonals: a(n,k) is the number of dots in the k-augmented centered triangle of order n, k>=0, n>=1.at n=38A385108