login
A012139
sinh(arcsin(arctanh(x)))=x+4/3!*x^3+84/5!*x^5+4208/7!*x^7+386064/9!*x^9...
0
1, 4, 84, 4208, 386064, 56523072, 12121690944, 3589856932608, 1406019035808000, 704535958463063040, 439949357001315947520, 335139715537167259791360, 305989012726577998256148480
OFFSET
0,2
CROSSREFS
Sequence in context: A024260 A099706 A012065 * A012037 A012025 A012107
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved