90046

Appears in sequences

• Number of subsets of { 1, ..., n } containing an A.P. of length 8.at n=21A018793
• Number of 4-ary Lyndon words of length n over Z_4 with trace 2 and subtrace 1.at n=11A074411
• Squares of triangular numbers, written backwards.at n=21A229701
• a(n) is the number of primes that can be written as +-1! +- 2! +- 3! +- ... +- n!.at n=21A357680