129150

Appears in sequences

• Numbers k such that sigma(k+1) = 5*phi(k).at n=12A067263
• A triangular array related to A077028 and distributing the values of A007582.at n=60A110552
• The following triangle is based on Pascal's triangle. The r-th term of the n-th row is sum of C(n,r) successive integers so that the sum of all the terms of the row is (2^n)*(2^n+1)/2, the 2^n -th triangular number. Sequence contains the triangle read by rows.at n=60A112358
• a(n) = n*(n+1)*(6*n-5)/2.at n=35A172082
• Number of 4Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.at n=8A207565