75466

Appears in sequences

• Triangular numbers whose reverse is prime.at n=16A066751
• Triangular numbers with sum of digits = 28.at n=20A068132
• Triangular numbers whose digit reversal is prime; trailing zeros are permitted.at n=22A115704
• Triangular numbers which are sums of 4 consecutive primes.at n=11A173420
• Primitive numbers in A229307.at n=36A229311
• Sequence of distinct least positive triangular numbers such that the arithmetic mean of the first n terms is also a triangular number. Initial term is 1.at n=11A236416
• Numbers n with the property that the symmetric representation of sigma(n) has four parts, each of width one and two regions meet at the center of the Dyck path.at n=24A264104