80342

Appears in sequences

• Triangle T(n, k) read by rows; given by [0, 1, 0, 2, 0, 3, 0, 4, ...] DELTA [1, 0, 2, 0, 2, 0, 3, 0, 2, 0, 4, 0, 2, 0, ...] (A000005 interspersed with 0's) where DELTA is Deléham's operator defined in A084938.at n=50A085852
• Numbers k such that 8*10^k + 87 is prime.at n=24A293397
• Number of length-n binary words containing no antisquares except 01 and 10.at n=26A307732