89676

Appears in sequences

• Structured truncated dodecahedral numbers.at n=17A100153
• Triangular numbers that are the product of 2 palindromes greater than 1.at n=38A115744
• Triangular numbers for which the number of divisors is also a triangular number.at n=26A116541
• Triangular numbers for which the sum of the digits is a square.at n=24A117404
• Refactorable triangular numbers.at n=22A272524
• G.f. A(x) satisfies: A(x - A(-x)^2) = x + A(x)^2.at n=8A277033
• Triangular numbers k such that psi(k) is a square, where psi(k) is the Dedekind psi function (A001615).at n=27A292064
• Hexagonal numbers (A000384) in which parity of digits alternates.at n=20A297645
• The first of three consecutive hexagonal numbers the sum of which is equal to the sum of three consecutive primes.at n=9A298272
• Numbers that start a run of four consecutive triangular numbers with four distinct prime factors.at n=20A349773