81192

Appears in sequences

• Principal diagonal of the convolution array A213825.at n=23A213826
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101.at n=11A260602
• Let x be the sum of the divisors d_i of k such that d_i | sigma(k). Sequence lists the numbers k for which x^3 = sigma(k).at n=5A284284
• a(n) = prime(n)*(prime(n-1) + prime(n+1)).at n=44A357679