20300

Appears in sequences

• Expansion of 1/((1-8*x)*(1-9*x)*(1-11*x)*(1-12*x)).at n=3A016092
• Numbers k such that phi(k) is equal to A008473(k).at n=13A039779
• Łukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171), with the last leaf implicit, i.e., these words are given without the last trailing zero, except for the null tree which is encoded as 0.at n=31A071153
• Łukasiewicz words that are also valid asynchronic siteswap juggling patterns.at n=20A071160
• Integers whose decimal expansion satisfies the condition that if we read each term from the left to right (the most significant to the least significant digit) then each nonzero digit gives a distance to the next nonzero digit to right (with a cyclic wrap-over from the least-significant to the most significant nonzero digit).at n=27A071161
• Numbers k such that phi(k) = Sum_{d|k} core(d) where core(x) is the squarefree part of x (A007913).at n=13A074786
• Least sum (n+1) + (n+2) + ... + (n+k) that is a multiple of the n-th triangular number, n(n+1)/2.at n=27A110351
• Expansion of 1/(1 - x^2 - 2 x^3 + x^4).at n=33A122512
• Row sums of triangle A134480.at n=28A134481
• a(n) = ADP(n) is the total number of aperiodic k-double-palindromes of n, where 2 <= k <= n.at n=20A181135
• a(n) = A016755(n) - A001845(n).at n=14A188050
• E.g.f. exp(exp(1/2*x^2+1/6*x^3)-1).at n=9A191424
• Base 2i representation of nonnegative integers.at n=20A212494
• a(0) = a(1) = 1, and a(n) = a(n-1) + a( (a(n-1)-1) mod n ) for n>=2.at n=34A268176
• Nonunitary near-perfect numbers: k such that nusigma(k) = k + d where d is a nonunitary divisor of k.at n=21A362969