27556
domain: N
Appears in sequences
- a(n) = (prime(n) - 1)^2.at n=38A005722
- Number of nonseparable tree-rooted planar maps with n + 4 edges and 5 vertices.at n=3A006413
- a(n) = (6*n + 4)^2.at n=27A016958
- a(n) = (7*n + 5)^2.at n=23A017042
- a(n) = (8*n+6)^2.at n=20A017138
- a(n) = (9*n + 4)^2.at n=18A017210
- a(n) = (10*n + 6)^2.at n=16A017342
- a(n) = (11*n+1)^2.at n=15A017402
- a(n) = (12*n+10)^2.at n=13A017642
- Discriminants of totally complex sextic fields (negated).at n=23A023687
- Numbers k such that phi(k) + sigma(k) is a prime.at n=42A038344
- Squares with digital root 7.at n=36A061101
- Integers n > 10583 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 10583.at n=28A066055
- Numbers having exactly six anti-divisors.at n=43A066472
- a(n) = 4*prime(n)^2.at n=22A069262
- Squares whose arithmetic mean of digits is an integer (i.e., the sum of digits is a multiple of the number of digits).at n=24A069711
- Least square s such that A078142(s) is equal to the n-th prime.at n=7A076830
- Squares whose decimal digits are nonsquares (2, 3, 5, 6, 7, 8).at n=12A077437
- Squares using only squarefree digits (2, 3, 5, 6, 7).at n=11A077676
- Let m = Wonderful Demlo number A002477(n); a(n) = square of the sum of digits of m.at n=19A080150