173880

Appears in sequences

• Even square pyramidal numbers.at n=39A015222
• Square pyramorphic numbers: suppose the k-th square pyramidal number S(k) (A000330) ends in k; sequence gives value of S(k).at n=5A060204
• Sum of the first n^2 squares.at n=8A109764
• Numbers with prime factorization pqrs^3t^3.at n=5A190385
• Numbers n for which there exists k > n such that A000203(k) = A000203(n) and A007947(k) = A007947(n), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=34A255334
• a(n) = n*(2*n + 1)*(4*n + 1)/3.at n=40A258582
• a(n) is the final term of the lexicographically first sequence of distinct positive multiples of n whose reciprocals sum to 1.at n=2A333099
• a(n) is the smallest square pyramidal number with exactly n prime factors (counted with multiplicity).at n=9A359192
• Numbers whose infinitary divisors have a mean infinitary abundancy index that is larger than 2.at n=12A374788