27924

Appears in sequences

• a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 7's.at n=5A048543
• a(n) = A028321(n)/2.at n=27A051473
• a(n) = n*(4*n^2 + n - 1)/2.at n=23A125200
• Numbers k such that k and k^2 use only the digits 2, 4, 6, 7 and 9.at n=13A137102
• Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths starting at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 9, n >= 2.at n=38A214042
• Sum of the next to smallest parts in the partitions of 4n into 4 parts with smallest part = 1.at n=35A239195
• Sum of piles of first n primes: a(n) = Sum(prime(i)*(2*i-1): 1<=i<=n).at n=22A316322