28052

Appears in sequences

• Numbers k such that 10*3^k - 1 is prime.at n=42A005542
• Total number of square parts in all partitions of n.at n=30A073336
• Square array, read by antidiagonals, where row n+1 is generated from row n by first removing terms in row n at positions {floor(m*(m+7)/6), m>=0} and then taking partial sums, starting with all 1's in row 0.at n=39A136217
• Triangle U, read by rows, where column k of U^(j+1) = column j of P^(3k+1) for j>=0, k>=0 and P=A136220.at n=22A136228
• Column 1 of triangle A136228; also equals column 3 of square array A136217.at n=5A136229
• Triangle, read by rows, equal to the matrix 4th power of triangle A136220.at n=15A136232
• Numbers which do not reach zero under either of the iterations: x -> floor(sqrt(x)) * (x - floor(sqrt(x))^2) or y -> ceiling(sqrt(y)) * (ceiling(sqrt(y))^2 - y).at n=32A219963
• Numbers which are the sum of a prime and the square of the next prime.at n=37A349660