158730

Appears in sequences

• Average theta series of odd unimodular lattices of dimension 11 (multiplied by 31).at n=4A029813
• Integers of the form (rep(n)-1)/n where rep(n)=1111111111...111 with n 1's is the n-th repunit number.at n=2A067944
• Smallest s for which there are exactly n primitive Pythagorean triangles with perimeter 2s; i.e., smallest s such that A078926(s) = n.at n=3A078927
• a(n) = floor( (10^n - 1) / (9*n) ).at n=6A089303
• Multiples of 5291.at n=30A178027
• a(n) = the smallest number k such that k*n is a number with a string of 1's followed by a string of 0's.at n=6A276348
• a(n) = binomial(n,2)*(2^(n-2) - n).at n=9A342483