59685

Appears in sequences

• Numbers k such that 7^k == -1 (mod k-1).at n=18A055690
• Terms of A073872 that do not change their position in the rearrangement; i.e., values of A073872(n) which equal n(n+1)/2.at n=27A073873
• Largest n-digit triangular number beginning with n.at n=4A077507
• Triangular numbers whose sum of squared digits is also triangular.at n=23A094890
• 0-sequence of reduction of hexagonal numbers sequence by x^2 -> x+1.at n=12A192143
• G.f.: x = Sum_{n>=1} a(n-1) * x^n / Product_{k=1..n} (1 + n*k*x).at n=5A275763
• Terms of A324315 (squarefree integers m > 1 such that if prime p divides m, then the sum of the base p digits of m is at least p) that are also hexagonal numbers (A000384) with index equal to their largest prime factor.at n=10A324319
• Hexagonal numbers that are products of exactly four distinct primes.at n=27A381920