18762

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MAZ = Mazzite (Na2,K2,Ca,Mg)5[Al10Si26O72].28H2O starting from a T1 atom.at n=13A019142
• Divide natural numbers in groups with prime(n) elements and add together.at n=15A034957
• Numbers k such that sigma(k+1) divides sigma(k), where sigma(k) is the sum of positive divisors of k.at n=25A058073
• Numbers k such that gcd(sigma(k), sigma(k+1)) > k.at n=36A066025
• Numbers k such that sigma(k) = 2*sigma(k+1).at n=13A163193
• The number of partitions of n into at least 3 parts from which we can form every partition of n into 3 parts by summing elements.at n=40A236970
• Number of nX4 0..1 arrays with no element equal to the same number of vertical neighbors as horizontal neighbors, with new values 0..1 introduced in row major order.at n=9A240645
• Indices of records in A100695.at n=21A287636
• Number of multisets of nonempty words with a total of n letters over senary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.at n=10A293736