139860
domain: N
Appears in sequences
- 4-dimensional pyramidal numbers: a(n) = n^2*(n^2-1)/12.at n=36A002415
- Theta series of 12-dimensional Coxeter-Todd lattice K_12.at n=6A004010
- Numbers k such that k and 6*k are anagrams.at n=15A023090
- Number of words of length 4 in the n(n-1)/2 transpositions of S[ n ] equivalent to the identity.at n=20A029699
- First differences of A069473.at n=9A069474
- A convolution triangle of numbers obtained from A036224.at n=24A132166
- a(n) = n^2 * (4*n^2 - 1) / 3.at n=18A187756
- Denominator of Sum_{k=1..n} 1/(k(k+1)(k+2)(k+3)) = Sum_{k=1..n} 1/Pochhammer(k,4).at n=34A230340
- Positive numbers m such that m^2 - 1 divides 4^m - 1.at n=38A271842
- a(n) is the least positive number whose divisors have all possible residues mod n.at n=36A280171
- a(n) is the smallest number with exactly n divisors that are Moran numbers, or -1 if no such number exists.at n=16A333457
- The smallest number whose divisor set mod p has p elements with p = prime(n).at n=11A378272