18622

Appears in sequences

• Expansion of Product_{m>=1} (1 - m*q^m)^3.at n=24A022663
• Stereoisomeric homologs with molecular formula C_{3+n} H_{6+2n}.at n=10A055936
• a(n) = Sum {k + j*m <= n} (k + j*m), with 0 < k,j,m <= n.at n=26A106847
• Indices m such that A128646(m)-1 is prime, where A128646 = denominator of partial sums of 1/(p(i)-1).at n=46A137689
• Number of partitions of n into distinct parts with boundary size 9.at n=34A227566
• Triangle read by rows: TR(m,n) is the Wiener index of the hexagonal trapezium T(m,n), defined in the He et al. reference (1 <= n <= m).at n=26A248095
• Number of (n+1)X(4+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nonincreasing.at n=16A263795
• Numbers that are not the difference of two binary palindromes (A006995).at n=42A290393
• Even numbers that are not the sum or difference of two binary palindromes (A006995).at n=5A290424
• Expansion of e.g.f. (sec(x) + tan(x))/sqrt(1 - 2*x).at n=6A296792
• Expansion of Product_{k>=1} 1/((1 - x^k)*(1 - x^(2*k)))^2.at n=15A319455
• Number of geometry-minimal periodic tilings of the sphere with Dress-complexity n.at n=16A335695