60378

Appears in sequences

• Even triangular numbers with prime indices.at n=35A034955
• Triangular numbers which are the sum of distinct double factorials (A006882).at n=29A115650
• Triangular numbers p*(p+1)/2 with p prime such that 1+(number of prime factors of p+1) is prime.at n=28A144549
• Triangular numbers which become primes when their rightmost digit is removed.at n=39A227936
• Triangular numbers n with digits d_1, d_2, ..., d_k such that d_1*(d_1+1)/2 + ... + d_k*(d_k+1)/2 is a triangular number.at n=40A254957
• The first of three consecutive triangular numbers the sum of which is equal to the sum of three consecutive primes.at n=29A298168
• Lesser of 2 successive tetraprimes (k, k+4) sandwiching three consecutive not squarefree numbers.at n=14A367791
• Hexagonal numbers that are products of exactly four distinct primes.at n=28A381920
• Semiperimeter of the unique primitive Pythagorean triple whose inradius is the n-th prime and whose short leg is an odd number.at n=39A382070