71248

Appears in sequences

• Number of prime pairs below 10^n having a difference of 34.at n=7A093752
• Numbers n, not divisible by 3, 5, 7 or 11, such that A000203(n)-n-1 and 2*n+1-A000203(n) are prime numbers.at n=23A180268
• Number of tilings of a 7 X n rectangle using right trominoes and 2 X 2 tiles.at n=8A219948
• Number of tilings of an 8 X n rectangle using right trominoes and 2 X 2 tiles.at n=7A219949
• Concatenate the terms of A027750 (omitting spaces and commas), chop into blocks of length 5, then omit any leading zeros.at n=3A362446
• a(n) is the number of positive integers k for which Sum_{i=1..j} (p_i+e_i) = n, where p_1^e_1*...*p_j^e_j is the prime factorization of k.at n=49A382330