162735

Appears in sequences

• a(n) = p(n)*(p(n)-1)/2 where p(n) = upper member of n-th pair of twin primes.at n=25A082669
• How many more primes than irreducible GF(2)[X] polynomials there are in range [0,2^n].at n=23A091231
• Triangular numbers t such that all the digits needed to write the consecutive triangular numbers from 0 to t fill exactly an equilateral triangle (no holes, no overlaps).at n=29A158030
• Triangular numbers which have one or more occurrences of exactly six different digits.at n=17A241789