47754domain: NAppears in sequencesTruncated square pyramid numbers: a(n) = Sum_{k = n..2*n} k^2.at n=27A050409Numbers k such that k^6 + 1091 is prime.at n=28A066386Numbers n such that n^6 + 545 is prime.at n=34A163592a(n) = 27*n^2 - 51*n + 24, n>=1.at n=42A304836