38024

Appears in sequences

• Even square pyramidal numbers.at n=23A015222
• Values of n^2 - 1 resulting from A050795.at n=17A050799
• Numbers n such that core(n)=floor(sqrt(n)), where core(x)=A007913(x) is the squarefree part of x and floor(sqrt(x))=A000196(x).at n=16A069186
• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=26A089952
• Sum of the first n^2 squares.at n=6A109764
• 1/24 of product of three numbers: n-th prime, previous and following number.at n=23A127922
• a(n) = 4*(3*n+1)*(3*n+2).at n=32A144410
• a(n) = (n^2-1)^2-1.at n=14A178392
• Number of blocks in a Steiner Quadruple System of order A047235(n+1).at n=31A228124
• Numbers k such that tau(k+1) - tau(k) = 3, where tau(k) = the number of divisors of k (A000005).at n=13A230653
• Number of partitions p of n that include (min(p) + max(p))/2 as a part.at n=50A238480
• Number of partitions of n into 8 sorts of parts.at n=5A246940
• Number of (n+2) X (4+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 0 and no antidiagonal sum 3 and no row sum 1 and no column sum 1.at n=21A257443
• Number of 312-avoiding derangements of {1,2,...,n}.at n=12A258041
• a(n) = n*(2*n + 1)*(4*n + 1)/3.at n=24A258582
• Numbers n such that uphi(n) = uphi(n+1), where uphi(n) is the unitary totient function (A047994).at n=38A287055
• Numbers k such that k and k+1 are both phi-practical numbers (A260653).at n=39A330871
• Numbers k such that k and k+1 are both half-Zumkeller numbers (A246198).at n=9A331371
• Numbers k such that k and k+1 both have more nonunitary than unitary prime divisors (A348121).at n=32A348122
• Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, among all distinct circles that can be constructed from a point on the origin and n equally spaced points on each of the +x,-x,+y,-y coordinates axes using only a compass.at n=50A361623