1594005domain: NAppears in sequencesTriangular numbers with square pyramidal indices.at n=17A076767Triangular numbers that are 5 times another triangular number.at n=5A077261Triangular numbers which are products of six distinct primes.at n=26A362758Odd multiplicative orders of 2+-i modulo primes p == 3 (mod 4).at n=18A385217