24957

Appears in sequences

• Numbers k such that k and k+1 have same sum of divisors.at n=13A002961
• Numerators of continued fraction convergents to sqrt(998).at n=7A042932
• Numbers k such that k and k+1 have the same sum but an unequal number of divisors.at n=9A054007
• Numbers k such that sigma(k) divides sigma(k+1), where sigma(k) is sum of positive divisors of k.at n=25A058072
• Numbers k such that sigma(k+1) divides sigma(k), where sigma(k) is the sum of positive divisors of k.at n=31A058073
• Numbers k such that gcd(sigma(k), sigma(k+1)) > k.at n=42A066025
• L-th order palindromes with L > 2.at n=18A089381
• Number of partitions of 2n in which each odd part has even multiplicity and each even part has odd multiplicity.at n=28A100847
• Constant term in the reduction by (x^2 -> x + 1) of the polynomial p(n,x) defined below at Comments.at n=10A192909
• Numbers n such that sigma(n+1) - sigma(n) = k*n for some integer k, where sigma(n) = A000203 (sum of divisors of n).at n=21A223136
• Table of consecutive numbers with the same sum of divisors.at n=26A225757
• Let p = n-th prime == 3 mod 8; a(n) = (sum of quadratic residues mod p that are < p/2) + (sum of all quadratic residues mod p).at n=15A282727
• Number of n X 7 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=13A301789
• Numbers k such that s(k) = s(k+1), where s(k) is the sum of recursive divisors of k (A333926).at n=13A333949
• Numbers m such that the delta(m) = abs(sigma(m+1)/(m+1) - sigma(m)/(m)) is smaller than delta(k) for all k < m.at n=19A335071
• Numbers k such that A051378(k) = A051378(k+1).at n=13A349283
• Number of solutions to 2*k_1 + 3*k_2 + ... + prime(n)*k_n = 1, where k_i are from {-1,0,1}, i=1..n.at n=14A369733