27341

Appears in sequences

• Numbers k such that prime(k) == 1 (mod sigma(k)).at n=14A067697
• a(n) = 62*n^2 - 1.at n=20A158680
• The non-common part of the smaller number of an amicable pair.at n=26A180326
• G.f.: 1/G(0) where G(k) = 1 + (-q)^(k+1) / (1 - (-q)^(k+1)/G(k+1) ).at n=60A227310
• Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4.at n=3A239335
• Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4.at n=2A239336
• T(n,k)=Number of nXk 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it, modulo 4.at n=17A239340
• T(n,k)=Number of nXk 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it, modulo 4.at n=18A239340